No valid observations in equation

[vita]

Hello,
I am running a program that calculates a system and estimates it using OLS. I have run the program several times and I had worked. However, it stopped working, I get the message: "No valid observations in equation". What could it be the problem? I puzzles me that it worked before, but today is the exception. I upload the workfile in here.

Thanks in advance.

PROGRAM:
pageselect INPC

system sys

'sys.append: Adds lines to the system specification
sys.append D(TCR_M_CD01) = C(631)+C(1)*TCR_M_CD01(-1)+C(46)*D(TCR_M_CD01(-1))+C(91)*D(TCR_M_CD01(-2))+C(136)*D(TCR_M_CD01(-3))+C(181)*D(TCR_M_CD01(-4))+C(226)*D(TCR_M_CD01(-5))+C(271)*D(TCR_M_CD01(-6))+C(316)*D(TCR_M_CD01(-7))+C(361)*D(TCR_M_CD01(-8))+C(406)*D(TCR_M_CD01(-9))+C(451)*D(TCR_M_CD01(-10))+C(496)*D(TCR_M_CD01(-11))+C(541)*D(TCR_M_CD01(-12))
sys.append D(TCR_M_CD02) = C(632)+C(2)*TCR_M_CD02(-1)+C(47)*D(TCR_M_CD02(-1))+C(92)*D(TCR_M_CD02(-2))+C(137)*D(TCR_M_CD02(-3))+C(182)*D(TCR_M_CD02(-4))+C(227)*D(TCR_M_CD02(-5))+C(272)*D(TCR_M_CD02(-6))+C(317)*D(TCR_M_CD02(-7))+C(362)*D(TCR_M_CD02(-8))+C(407)*D(TCR_M_CD02(-9))+C(452)*D(TCR_M_CD02(-10))+C(497)*D(TCR_M_CD02(-11))+C(542)*D(TCR_M_CD02(-12))
sys.append D(TCR_M_CD03) = C(633)+C(3)*TCR_M_CD03(-1)+C(48)*D(TCR_M_CD03(-1))+C(93)*D(TCR_M_CD03(-2))
sys.append D(TCR_M_CD04) = C(634)+C(4)*TCR_M_CD04(-1)+C(49)*D(TCR_M_CD04(-1))+C(94)*D(TCR_M_CD04(-2))+C(139)*D(TCR_M_CD04(-3))+C(184)*D(TCR_M_CD04(-4))+C(229)*D(TCR_M_CD04(-5))+C(274)*D(TCR_M_CD04(-6))+C(319)*D(TCR_M_CD04(-7))+C(364)*D(TCR_M_CD04(-8))+C(409)*D(TCR_M_CD04(-9))+C(454)*D(TCR_M_CD04(-10))+C(499)*D(TCR_M_CD04(-11))+C(544)*D(TCR_M_CD04(-12))
sys.append D(TCR_M_CD05) = C(635)+C(5)*TCR_M_CD05(-1)+C(50)*D(TCR_M_CD05(-1))+C(95)*D(TCR_M_CD05(-2))+C(140)*D(TCR_M_CD05(-3))+C(185)*D(TCR_M_CD05(-4))+C(230)*D(TCR_M_CD05(-5))+C(275)*D(TCR_M_CD05(-6))+C(320)*D(TCR_M_CD05(-7))+C(365)*D(TCR_M_CD05(-8))+C(410)*D(TCR_M_CD05(-9))+C(455)*D(TCR_M_CD05(-10))+C(500)*D(TCR_M_CD05(-11))+C(545)*D(TCR_M_CD05(-12))
sys.append D(TCR_M_CD06) = C(636)+C(6)*TCR_M_CD06(-1)+C(51)*D(TCR_M_CD06(-1))+C(96)*D(TCR_M_CD06(-2))+C(141)*D(TCR_M_CD06(-3))+C(186)*D(TCR_M_CD06(-4))+C(231)*D(TCR_M_CD06(-5))+C(276)*D(TCR_M_CD06(-6))+C(321)*D(TCR_M_CD06(-7))+C(366)*D(TCR_M_CD06(-8))+C(411)*D(TCR_M_CD06(-9))+C(456)*D(TCR_M_CD06(-10))+C(501)*D(TCR_M_CD06(-11))+C(546)*D(TCR_M_CD06(-12))
sys.append D(TCR_M_CD07) = C(637)+C(7)*TCR_M_CD07(-1)+C(52)*D(TCR_M_CD07(-1))+C(97)*D(TCR_M_CD07(-2))+C(142)*D(TCR_M_CD07(-3))+C(187)*D(TCR_M_CD07(-4))+C(232)*D(TCR_M_CD07(-5))+C(277)*D(TCR_M_CD07(-6))
sys.append D(TCR_M_CD08) = C(638)+C(8)*TCR_M_CD08(-1)+C(53)*D(TCR_M_CD08(-1))+C(98)*D(TCR_M_CD08(-2))+C(143)*D(TCR_M_CD08(-3))+C(188)*D(TCR_M_CD08(-4))+C(233)*D(TCR_M_CD08(-5))+C(278)*D(TCR_M_CD08(-6))+C(323)*D(TCR_M_CD08(-7))+C(368)*D(TCR_M_CD08(-8))+C(413)*D(TCR_M_CD08(-9))+C(458)*D(TCR_M_CD08(-10))+C(503)*D(TCR_M_CD08(-11))+C(548)*D(TCR_M_CD08(-12))
sys.append D(TCR_M_CD09) = C(639)+C(9)*TCR_M_CD09(-1)
sys.append D(TCR_M_CD10) = C(640)+C(10)*TCR_M_CD10(-1)+C(55)*D(TCR_M_CD10(-1))+C(100)*D(TCR_M_CD10(-2))+C(145)*D(TCR_M_CD10(-3))+C(190)*D(TCR_M_CD10(-4))+C(235)*D(TCR_M_CD10(-5))+C(280)*D(TCR_M_CD10(-6))+C(325)*D(TCR_M_CD10(-7))
sys.append D(TCR_M_CD11) = C(641)+C(11)*TCR_M_CD11(-1)+C(56)*D(TCR_M_CD11(-1))+C(101)*D(TCR_M_CD11(-2))+C(146)*D(TCR_M_CD11(-3))+C(191)*D(TCR_M_CD11(-4))+C(236)*D(TCR_M_CD11(-5))+C(281)*D(TCR_M_CD11(-6))+C(326)*D(TCR_M_CD11(-7))+C(371)*D(TCR_M_CD11(-8))+C(416)*D(TCR_M_CD11(-9))+C(461)*D(TCR_M_CD11(-10))+C(506)*D(TCR_M_CD11(-11))+C(551)*D(TCR_M_CD11(-12))+C(596)*D(TCR_M_CD11(-13))
sys.append D(TCR_M_CD12) = C(642)+C(12)*TCR_M_CD12(-1)+C(57)*D(TCR_M_CD12(-1))+C(102)*D(TCR_M_CD12(-2))+C(147)*D(TCR_M_CD12(-3))+C(192)*D(TCR_M_CD12(-4))+C(237)*D(TCR_M_CD12(-5))+C(282)*D(TCR_M_CD12(-6))+C(327)*D(TCR_M_CD12(-7))
sys.append D(TCR_M_CD13) = C(643)+C(13)*TCR_M_CD13(-1)+C(58)*D(TCR_M_CD13(-1))+C(103)*D(TCR_M_CD13(-2))+C(148)*D(TCR_M_CD13(-3))+C(193)*D(TCR_M_CD13(-4))+C(238)*D(TCR_M_CD13(-5))+C(283)*D(TCR_M_CD13(-6))
sys.append D(TCR_M_CD15) = C(644)+C(14)*TCR_M_CD15(-1)+C(59)*D(TCR_M_CD15(-1))+C(104)*D(TCR_M_CD15(-2))+C(149)*D(TCR_M_CD15(-3))+C(194)*D(TCR_M_CD15(-4))+C(239)*D(TCR_M_CD15(-5))+C(284)*D(TCR_M_CD15(-6))+C(329)*D(TCR_M_CD15(-7))+C(374)*D(TCR_M_CD15(-8))+C(419)*D(TCR_M_CD15(-9))+C(464)*D(TCR_M_CD15(-10))+C(509)*D(TCR_M_CD15(-11))+C(554)*D(TCR_M_CD15(-12))
sys.append D(TCR_M_CD16) = C(645)+C(15)*TCR_M_CD16(-1)+C(60)*D(TCR_M_CD16(-1))+C(105)*D(TCR_M_CD16(-2))+C(150)*D(TCR_M_CD16(-3))+C(195)*D(TCR_M_CD16(-4))+C(240)*D(TCR_M_CD16(-5))+C(285)*D(TCR_M_CD16(-6))+C(330)*D(TCR_M_CD16(-7))+C(375)*D(TCR_M_CD16(-8))+C(420)*D(TCR_M_CD16(-9))+C(465)*D(TCR_M_CD16(-10))+C(510)*D(TCR_M_CD16(-11))+C(555)*D(TCR_M_CD16(-12))
sys.append D(TCR_M_CD17) = C(646)+C(16)*TCR_M_CD17(-1)+C(61)*D(TCR_M_CD17(-1))+C(106)*D(TCR_M_CD17(-2))+C(151)*D(TCR_M_CD17(-3))+C(196)*D(TCR_M_CD17(-4))+C(241)*D(TCR_M_CD17(-5))+C(286)*D(TCR_M_CD17(-6))+C(331)*D(TCR_M_CD17(-7))+C(376)*D(TCR_M_CD17(-8))+C(421)*D(TCR_M_CD17(-9))+C(466)*D(TCR_M_CD17(-10))+C(511)*D(TCR_M_CD17(-11))+C(556)*D(TCR_M_CD17(-12))
sys.append D(TCR_M_CD18) = C(647)+C(17)*TCR_M_CD18(-1)+C(62)*D(TCR_M_CD18(-1))+C(107)*D(TCR_M_CD18(-2))+C(152)*D(TCR_M_CD18(-3))+C(197)*D(TCR_M_CD18(-4))+C(242)*D(TCR_M_CD18(-5))+C(287)*D(TCR_M_CD18(-6))+C(332)*D(TCR_M_CD18(-7))+C(377)*D(TCR_M_CD18(-8))+C(422)*D(TCR_M_CD18(-9))+C(467)*D(TCR_M_CD18(-10))+C(512)*D(TCR_M_CD18(-11))+C(557)*D(TCR_M_CD18(-12))
sys.append D(TCR_M_CD19) = C(648)+C(18)*TCR_M_CD19(-1)+C(63)*D(TCR_M_CD19(-1))+C(108)*D(TCR_M_CD19(-2))+C(153)*D(TCR_M_CD19(-3))+C(198)*D(TCR_M_CD19(-4))+C(243)*D(TCR_M_CD19(-5))+C(288)*D(TCR_M_CD19(-6))+C(333)*D(TCR_M_CD19(-7))
sys.append D(TCR_M_CD20) = C(649)+C(19)*TCR_M_CD20(-1)+C(64)*D(TCR_M_CD20(-1))+C(109)*D(TCR_M_CD20(-2))+C(154)*D(TCR_M_CD20(-3))+C(199)*D(TCR_M_CD20(-4))+C(244)*D(TCR_M_CD20(-5))+C(289)*D(TCR_M_CD20(-6))
sys.append D(TCR_M_CD21) = C(650)+C(20)*TCR_M_CD21(-1)+C(65)*D(TCR_M_CD21(-1))+C(110)*D(TCR_M_CD21(-2))+C(155)*D(TCR_M_CD21(-3))+C(200)*D(TCR_M_CD21(-4))+C(245)*D(TCR_M_CD21(-5))+C(290)*D(TCR_M_CD21(-6))
sys.append D(TCR_M_CD22) = C(651)+C(21)*TCR_M_CD22(-1)+C(66)*D(TCR_M_CD22(-1))+C(111)*D(TCR_M_CD22(-2))+C(156)*D(TCR_M_CD22(-3))+C(201)*D(TCR_M_CD22(-4))+C(246)*D(TCR_M_CD22(-5))+C(291)*D(TCR_M_CD22(-6))
sys.append D(TCR_M_CD23) = C(652)+C(22)*TCR_M_CD23(-1)+C(67)*D(TCR_M_CD23(-1))+C(112)*D(TCR_M_CD23(-2))+C(157)*D(TCR_M_CD23(-3))+C(202)*D(TCR_M_CD23(-4))+C(247)*D(TCR_M_CD23(-5))+C(292)*D(TCR_M_CD23(-6))+C(337)*D(TCR_M_CD23(-7))+C(382)*D(TCR_M_CD23(-8))+C(427)*D(TCR_M_CD23(-9))+C(472)*D(TCR_M_CD23(-10))+C(517)*D(TCR_M_CD23(-11))+C(562)*D(TCR_M_CD23(-12))
sys.append D(TCR_M_CD24) = C(653)+C(23)*TCR_M_CD24(-1)+C(68)*D(TCR_M_CD24(-1))+C(113)*D(TCR_M_CD24(-2))+C(158)*D(TCR_M_CD24(-3))+C(203)*D(TCR_M_CD24(-4))+C(248)*D(TCR_M_CD24(-5))+C(293)*D(TCR_M_CD24(-6))
sys.append D(TCR_M_CD25) = C(654)+C(24)*TCR_M_CD25(-1)+C(69)*D(TCR_M_CD25(-1))+C(114)*D(TCR_M_CD25(-2))+C(159)*D(TCR_M_CD25(-3))+C(204)*D(TCR_M_CD25(-4))+C(249)*D(TCR_M_CD25(-5))+C(294)*D(TCR_M_CD25(-6))
sys.append D(TCR_M_CD26) = C(655)+C(25)*TCR_M_CD26(-1)+C(70)*D(TCR_M_CD26(-1))+C(115)*D(TCR_M_CD26(-2))+C(160)*D(TCR_M_CD26(-3))+C(205)*D(TCR_M_CD26(-4))+C(250)*D(TCR_M_CD26(-5))+C(295)*D(TCR_M_CD26(-6))+C(340)*D(TCR_M_CD26(-7))+C(385)*D(TCR_M_CD26(-8))+C(430)*D(TCR_M_CD26(-9))+C(475)*D(TCR_M_CD26(-10))+C(520)*D(TCR_M_CD26(-11))+C(565)*D(TCR_M_CD26(-12))
sys.append D(TCR_M_CD27) = C(656)+C(26)*TCR_M_CD27(-1)+C(71)*D(TCR_M_CD27(-1))+C(116)*D(TCR_M_CD27(-2))+C(161)*D(TCR_M_CD27(-3))+C(206)*D(TCR_M_CD27(-4))+C(251)*D(TCR_M_CD27(-5))+C(296)*D(TCR_M_CD27(-6))+C(341)*D(TCR_M_CD27(-7))+C(386)*D(TCR_M_CD27(-8))+C(431)*D(TCR_M_CD27(-9))+C(476)*D(TCR_M_CD27(-10))+C(521)*D(TCR_M_CD27(-11))+C(566)*D(TCR_M_CD27(-12))
sys.append D(TCR_M_CD28) = C(657)+C(27)*TCR_M_CD28(-1)+C(72)*D(TCR_M_CD28(-1))+C(117)*D(TCR_M_CD28(-2))+C(162)*D(TCR_M_CD28(-3))+C(207)*D(TCR_M_CD28(-4))+C(252)*D(TCR_M_CD28(-5))+C(297)*D(TCR_M_CD28(-6))+C(342)*D(TCR_M_CD28(-7))+C(387)*D(TCR_M_CD28(-8))+C(432)*D(TCR_M_CD28(-9))+C(477)*D(TCR_M_CD28(-10))+C(522)*D(TCR_M_CD28(-11))+C(567)*D(TCR_M_CD28(-12))
sys.append D(TCR_M_CD29) = C(658)+C(28)*TCR_M_CD29(-1)+C(73)*D(TCR_M_CD29(-1))+C(118)*D(TCR_M_CD29(-2))+C(163)*D(TCR_M_CD29(-3))+C(208)*D(TCR_M_CD29(-4))+C(253)*D(TCR_M_CD29(-5))+C(298)*D(TCR_M_CD29(-6))+C(343)*D(TCR_M_CD29(-7))+C(388)*D(TCR_M_CD29(-8))+C(433)*D(TCR_M_CD29(-9))+C(478)*D(TCR_M_CD29(-10))+C(523)*D(TCR_M_CD29(-11))+C(568)*D(TCR_M_CD29(-12))
sys.append D(TCR_M_CD30) = C(659)+C(29)*TCR_M_CD30(-1)+C(74)*D(TCR_M_CD30(-1))+C(119)*D(TCR_M_CD30(-2))+C(164)*D(TCR_M_CD30(-3))+C(209)*D(TCR_M_CD30(-4))+C(254)*D(TCR_M_CD30(-5))+C(299)*D(TCR_M_CD30(-6))
sys.append D(TCR_M_CD31) = C(660)+C(30)*TCR_M_CD31(-1)+C(75)*D(TCR_M_CD31(-1))+C(120)*D(TCR_M_CD31(-2))+C(165)*D(TCR_M_CD31(-3))+C(210)*D(TCR_M_CD31(-4))+C(255)*D(TCR_M_CD31(-5))+C(300)*D(TCR_M_CD31(-6))+C(345)*D(TCR_M_CD31(-7))+C(390)*D(TCR_M_CD31(-8))+C(435)*D(TCR_M_CD31(-9))+C(480)*D(TCR_M_CD31(-10))+C(525)*D(TCR_M_CD31(-11))+C(570)*D(TCR_M_CD31(-12))
sys.append D(TCR_M_CD32) = C(661)+C(31)*TCR_M_CD32(-1)+C(76)*D(TCR_M_CD32(-1))+C(121)*D(TCR_M_CD32(-2))+C(166)*D(TCR_M_CD32(-3))+C(211)*D(TCR_M_CD32(-4))+C(256)*D(TCR_M_CD32(-5))+C(301)*D(TCR_M_CD32(-6))+C(346)*D(TCR_M_CD32(-7))+C(391)*D(TCR_M_CD32(-8))+C(436)*D(TCR_M_CD32(-9))+C(481)*D(TCR_M_CD32(-10))+C(526)*D(TCR_M_CD32(-11))+C(571)*D(TCR_M_CD32(-12))
sys.append D(TCR_M_CD33) = C(662)+C(32)*TCR_M_CD33(-1)+C(77)*D(TCR_M_CD33(-1))+C(122)*D(TCR_M_CD33(-2))+C(167)*D(TCR_M_CD33(-3))+C(212)*D(TCR_M_CD33(-4))+C(257)*D(TCR_M_CD33(-5))+C(302)*D(TCR_M_CD33(-6))+C(347)*D(TCR_M_CD33(-7))+C(392)*D(TCR_M_CD33(-8))+C(437)*D(TCR_M_CD33(-9))+C(482)*D(TCR_M_CD33(-10))+C(527)*D(TCR_M_CD33(-11))+C(572)*D(TCR_M_CD33(-12))
sys.append D(TCR_M_CD34) = C(663)+C(33)*TCR_M_CD34(-1)+C(78)*D(TCR_M_CD34(-1))+C(123)*D(TCR_M_CD34(-2))+C(168)*D(TCR_M_CD34(-3))+C(213)*D(TCR_M_CD34(-4))+C(258)*D(TCR_M_CD34(-5))+C(303)*D(TCR_M_CD34(-6))+C(348)*D(TCR_M_CD34(-7))+C(393)*D(TCR_M_CD34(-8))+C(438)*D(TCR_M_CD34(-9))+C(483)*D(TCR_M_CD34(-10))+C(528)*D(TCR_M_CD34(-11))+C(573)*D(TCR_M_CD34(-12))
sys.append D(TCR_M_CD35) = C(664)+C(34)*TCR_M_CD35(-1)+C(79)*D(TCR_M_CD35(-1))+C(124)*D(TCR_M_CD35(-2))+C(169)*D(TCR_M_CD35(-3))+C(214)*D(TCR_M_CD35(-4))+C(259)*D(TCR_M_CD35(-5))+C(304)*D(TCR_M_CD35(-6))+C(349)*D(TCR_M_CD35(-7))+C(394)*D(TCR_M_CD35(-8))+C(439)*D(TCR_M_CD35(-9))+C(484)*D(TCR_M_CD35(-10))+C(529)*D(TCR_M_CD35(-11))+C(574)*D(TCR_M_CD35(-12))
sys.append D(TCR_M_CD36) = C(665)+C(35)*TCR_M_CD36(-1)+C(80)*D(TCR_M_CD36(-1))+C(125)*D(TCR_M_CD36(-2))+C(170)*D(TCR_M_CD36(-3))+C(215)*D(TCR_M_CD36(-4))+C(260)*D(TCR_M_CD36(-5))+C(305)*D(TCR_M_CD36(-6))
sys.append D(TCR_M_CD37) = C(666)+C(36)*TCR_M_CD37(-1)+C(81)*D(TCR_M_CD37(-1))+C(126)*D(TCR_M_CD37(-2))+C(171)*D(TCR_M_CD37(-3))+C(216)*D(TCR_M_CD37(-4))+C(261)*D(TCR_M_CD37(-5))+C(306)*D(TCR_M_CD37(-6))+C(351)*D(TCR_M_CD37(-7))+C(396)*D(TCR_M_CD37(-8))+C(441)*D(TCR_M_CD37(-9))+C(486)*D(TCR_M_CD37(-10))+C(531)*D(TCR_M_CD37(-11))+C(576)*D(TCR_M_CD37(-12))
sys.append D(TCR_M_CD38) = C(667)+C(37)*TCR_M_CD38(-1)+C(82)*D(TCR_M_CD38(-1))+C(127)*D(TCR_M_CD38(-2))+C(172)*D(TCR_M_CD38(-3))+C(217)*D(TCR_M_CD38(-4))+C(262)*D(TCR_M_CD38(-5))+C(307)*D(TCR_M_CD38(-6))+C(352)*D(TCR_M_CD38(-7))+C(397)*D(TCR_M_CD38(-8))+C(442)*D(TCR_M_CD38(-9))+C(487)*D(TCR_M_CD38(-10))+C(532)*D(TCR_M_CD38(-11))+C(577)*D(TCR_M_CD38(-12))
sys.append D(TCR_M_CD39) = C(668)+C(38)*TCR_M_CD39(-1)+C(83)*D(TCR_M_CD39(-1))+C(128)*D(TCR_M_CD39(-2))+C(173)*D(TCR_M_CD39(-3))+C(218)*D(TCR_M_CD39(-4))+C(263)*D(TCR_M_CD39(-5))+C(308)*D(TCR_M_CD39(-6))+C(353)*D(TCR_M_CD39(-7))+C(398)*D(TCR_M_CD39(-8))+C(443)*D(TCR_M_CD39(-9))+C(488)*D(TCR_M_CD39(-10))+C(533)*D(TCR_M_CD39(-11))+C(578)*D(TCR_M_CD39(-12))
sys.append D(TCR_M_CD40) = C(669)+C(39)*TCR_M_CD40(-1)+C(84)*D(TCR_M_CD40(-1))+C(129)*D(TCR_M_CD40(-2))+C(174)*D(TCR_M_CD40(-3))+C(219)*D(TCR_M_CD40(-4))+C(264)*D(TCR_M_CD40(-5))+C(309)*D(TCR_M_CD40(-6))+C(354)*D(TCR_M_CD40(-7))+C(399)*D(TCR_M_CD40(-8))+C(444)*D(TCR_M_CD40(-9))+C(489)*D(TCR_M_CD40(-10))+C(534)*D(TCR_M_CD40(-11))+C(579)*D(TCR_M_CD40(-12))
sys.append D(TCR_M_CD41) = C(670)+C(40)*TCR_M_CD41(-1)+C(85)*D(TCR_M_CD41(-1))+C(130)*D(TCR_M_CD41(-2))+C(175)*D(TCR_M_CD41(-3))+C(220)*D(TCR_M_CD41(-4))+C(265)*D(TCR_M_CD41(-5))+C(310)*D(TCR_M_CD41(-6))
sys.append D(TCR_M_CD42) = C(671)+C(41)*TCR_M_CD42(-1)+C(86)*D(TCR_M_CD42(-1))+C(131)*D(TCR_M_CD42(-2))+C(176)*D(TCR_M_CD42(-3))+C(221)*D(TCR_M_CD42(-4))+C(266)*D(TCR_M_CD42(-5))+C(311)*D(TCR_M_CD42(-6))+C(356)*D(TCR_M_CD42(-7))+C(401)*D(TCR_M_CD42(-8))+C(446)*D(TCR_M_CD42(-9))+C(491)*D(TCR_M_CD42(-10))+C(536)*D(TCR_M_CD42(-11))+C(581)*D(TCR_M_CD42(-12))
sys.append D(TCR_M_CD43) = C(672)+C(42)*TCR_M_CD43(-1)+C(87)*D(TCR_M_CD43(-1))+C(132)*D(TCR_M_CD43(-2))+C(177)*D(TCR_M_CD43(-3))+C(222)*D(TCR_M_CD43(-4))+C(267)*D(TCR_M_CD43(-5))+C(312)*D(TCR_M_CD43(-6))+C(357)*D(TCR_M_CD43(-7))+C(402)*D(TCR_M_CD43(-8))+C(447)*D(TCR_M_CD43(-9))+C(492)*D(TCR_M_CD43(-10))+C(537)*D(TCR_M_CD43(-11))+C(582)*D(TCR_M_CD43(-12))
sys.append D(TCR_M_CD44) = C(673)+C(43)*TCR_M_CD44(-1)+C(88)*D(TCR_M_CD44(-1))+C(133)*D(TCR_M_CD44(-2))+C(178)*D(TCR_M_CD44(-3))+C(223)*D(TCR_M_CD44(-4))+C(268)*D(TCR_M_CD44(-5))+C(313)*D(TCR_M_CD44(-6))
sys.append D(TCR_M_CD45) = C(674)+C(44)*TCR_M_CD45(-1)+C(89)*D(TCR_M_CD45(-1))+C(134)*D(TCR_M_CD45(-2))+C(179)*D(TCR_M_CD45(-3))+C(224)*D(TCR_M_CD45(-4))+C(269)*D(TCR_M_CD45(-5))+C(314)*D(TCR_M_CD45(-6))
sys.append D(TCR_M_CD46) = C(675)+C(45)*TCR_M_CD46(-1)+C(90)*D(TCR_M_CD46(-1))+C(135)*D(TCR_M_CD46(-2))+C(180)*D(TCR_M_CD46(-3))+C(225)*D(TCR_M_CD46(-4))+C(270)*D(TCR_M_CD46(-5))+C(315)*D(TCR_M_CD46(-6))+C(360)*D(TCR_M_CD46(-7))+C(405)*D(TCR_M_CD46(-8))+C(450)*D(TCR_M_CD46(-9))+C(495)*D(TCR_M_CD46(-10))+C(540)*D(TCR_M_CD46(-11))+C(585)*D(TCR_M_CD46(-12))

'Estimates the specification using system least squares
sys.ls
'Save de vector of coefficients
coef c_ips = c

[EViews Gareth]

Starting values. Fill the c vector with valid numbers instead of NAs.

[vita]

It worked, thank you so much =)