I am using MS Visio 2013 Standard, and following these steps:
1: Draw a horizontal line, i.e:
BeginX:6 mm EndX:14 mm BeginY:64 mm EndY:64 mm2: Convert shape to the group, i.e got new group shape
3: Draw one more horizontal line:
BeginX:16 mm EndX:24 mm BeginY:64 mm EndY:64 mm4: Select new group shape (from step 2) and select step 3 shape: Home -> Add to Group
I am getting an exception
visio internal error #2912
Action: 1053 Add to group
First try closing and reopening the file. Next try restarting visio
My question is: is this a Visio bug?
The file is probably corrupt. Try copying first only the shapes of interest in a newly created drawing. If it works, copy the other shapes as well.