Topic Title

I do not know the exact meaning of the error message, but I suspect you may not be creating or deleting new entities correctly and this is leading to the error and shutdown of Datacad. Are you programming in the orginal version or in Delphi DCAL? Can you post a portion of the code showing how you are creating and deleting the entities? If you have not already done so, you might also review the documentation for creating entities in the original DCAL reference manual.

I found the cause of the error.

I store entities in the variable.
And I RELINK the entities.
And I UPDATE the entities - without GET entities again.

Resolution:
I positioned the GET command before the UPDATE command.
A macro is run good. DataCAD is run good.

Thanks your post.