Make graph: error

[hana88]

Dear All,

First, I'm trying to compare the baseline and scenario forecasts from VAR model using graph. However when I tried to make the graph (proc>make graph), a certain error came out and i don't know how to treat this. The endogenous variables that I'm aware of is rgdp and rgdp_1. Not sure how rgdp_0 came into the picture. Can someone help? Would appreciate it very much thanks!

p/s: the sample error is as attached.