( Attempt to send the same message one more, but to do it in another category )

Hi, all.
Can anybody help me?

I've encountered with the following:
When I try to packing some tables by using the "PACK" command,
I can only read the message "Data type mismatch", nothing else done.

If You encountered with something like this and if You know what is
to do with it, please, answer me.

Thank You, sorry for bad English.

Dmitry Belyaev.