Hi Craig,
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>>>In getexpr if I use my own functions, like GetDescription(town,'towns','town','fullname') I always have an error: 'Invalid subscribe (?) reference' (or something similar). This Error could be ignored. Now is my question: how can I catch this error and in this case do nothing. All other errors should be treated as 'normal' errors.
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>>Nadya,
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>>If you are getting an error, something is wrong. It could be that GetDescription is an internal function used by VFP. I've seen this before. I had a function called IsLead that would give me a similar error.
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> I tried Help on GetDescription and it seems like it's not a VFP function. Anyway, I'm getting this error in each my function, like GetLotSizeSqFt or GetCondoname, which are definitely not VFP functions. I'll try getexp from command window and see, if I will receive the same Error.
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I tried getexpr to gg from command window and it works fine. So, the problem is in the program. Actually, I asked this question not for me, but for my colleague. We will do some futher investigations.

Thanks for your help.