Hi @cgnolte, thanks for showing concern, and sorry for the late reply. I was on a different machine and did not have the old machine’s error I mentioned in this topic, but even on the new machine, the same error persisted. It turns out the issue was due to a bug when using representative dates for emissions, and I just used bug-fix at github to recompile CMAQ. That problem is now gone, but a new problem probably unrelated to the one in this thread came up - I have started a new thread for that new issue at Longjmp causes uninitialized stack frame.