I think that there is a bug in the 2D script of the library part 'W Feature 1 11' - If one switches the sidelight off, the following error report comes up :-"Cannot DEL transformation above TOP at line 226 in the 2D script of file W Feature 1 11.gsm"
It looks like a mistake in the script. This particular error should be of no consequence. While it is appropriate for the debugger it seems that this kind of internal GDL error should not be reported to the user.
Yes - it generates correctly - but the error message comes up with every regeneration of the 2D window - which is annoying to say the least, making this lib. part effectively un-usable, if the sidelight is switched off.