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Cannot find jacobian array file

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Often when I initiate a PEST run with SVD-assist and NOPTMAX = -2 or -1 the process ends with the message "cannot find Jacobian array file".

The process starts with a calculation of the Jacobian matrix:


But ends like this:


It always works when I run the model without pilot points. A forward run with the pilot points also works.

I have managed to run both a parameter estimation and NSCM with SVD-assists before with the same model constraints but when experience this problem when I attempt to make changes in the model. 

Ideas on how to solve this issue?

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