Find if NLIN failed to converge

[PaalNavestad]

Hi, I'm coding a work flow where I first try to find a decline curve using Nlin. Some by groups has bad data or do not follow a decline. I can see this from the fact that the procedure does not Converge. I can use non-convergence as flag to call different methods. Basically I just want a way to programmatically see the fact that this text is put to the output/log

WARNING: PROC NLIN failed to converge.

I would rather not have to read the log/output as text if possible.

Does anybody know of a macro/method to test for this in an easy manner?

[Ksharp · Accepted solution]

You could try option
proc nlin outest=

And you need a good initial value for parameters.
@Rick_SAS wrote a blog about it before .

[PaalNavestad]

Thanks, Yes the outest has the data.

[Rick_SAS]

This article describes two methods for monitoring the convergence status of many SAS procedures, including NLIN:  "Monitor convergence during simulation studies in SAS."

[PaalNavestad]

Thanks,