"Object already in collection, cannot append" error message

[chri35155]

When i give a string to my adocommand.commandtext, it give me the following message:
"Object already in collection, cannot append".

Sometimes it works but most of the time it give me the error message.

N.B. I do not execute the command in debug mode. I jsut insert the string in the command.

ex: adocommand.commandtext:= "insert into ... "

I use an access database (97).

Thanks in advance

Christian