>I'm using an ADIR(myarray,..) command. But array myarray sometimes already exists and is field with data. I want check if array already created , then release it. But i have trouble doing it. Is anybody can help me with my problem, please. Thanks a lot in advance.

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ADIR() should create the array if it doesn't exists. So you can just release the array before calling ADIR()

release myarray

HTH,