TestComplete 10 AddColumn method for table type project variables
In multiple tests I use project variables of type table. In the scripts (vbscript) I add columns to the table with the addcolumn method. Ex: Project.Variables.ExampleVar.AddColumn With ...
The issue had to do with calling the AddColumn method more than once. I have been informed it will be fixed in the next version of TestComplete (10.1 I suppose).