Invalid contrasts in 3 condition 3 visit design

[Grace Allison]

Hello SwE users!

I am trying to estimate contrasts using SwE. I believe I have mapped my paths correctly and have run a batch to estimate a model with 3 conditions and 3 visits entered as covariates. When i attempt to estimate the contrasts for main effects using F-test, I keep getting an "invalid contrast" response. I have tried [1/3 1/3 1/3 0 0 0] and [1 1 1 -1 -1 -1] which have worked with other data from the same study.

Are there any suggestions for why this might be happening and how to overcome it?

Thanks in advance!