VEC restriction syntax error

[Distopia]

I’m using Eviews8 and when imposing restrictions on the short run determinants of a VEC model, I encounter the error message, “Restriction syntax error: unrecognised character”.

This is one part of the representation of the model:
D(LOG(CON)) = A(1,1)*(B(1,1)*LOG(CON(-1)) + B(1,2)*LOG(_2009B_INV(-1)) + B(1,3)*LOG(_2009DWI_INV(-1)) + B(1,4)) + C(1,1)*D(LOG(CON(-1))) + C(1,2)*D(LOG(CON(-2))) + C(1,3)*D(LOG(_2009B_INV(-1))) + C(1,4)*D(LOG(_2009B_INV(-2))) + C(1,5)*D(LOG(_2009DWI_INV(-1))) + C(1,6)*D(LOG(_2009DWI_INV(-2))) + C(1,7) + C(1,8)*D2008Q4 + C(1,9)*D1990

In order to impose the restriction C(1,2)=0, I went to the “Estimate” function in the top panel of the VAR window, went to the “Restrictions Tab” (i.e. the third tab) and ticked the “Impose Restrictions” box.

Anyone able to tell me what I’m doing wrong?