@acer it helps a bit, executing your points 1 and 2 on each plotting line causes all plots look to the same (they are not perfect, "90" is missing on x, but ok) but re-executing the whole sheet after that gives again on most plots the efect like on my above plot no. 2

Is the "temporary removal of plot output" just temporary solution for this issue?

 am I doing something wrong in my sheet ( PT_LIN.mw )?

regards

Wojtek

@tomleslie thank you for your sugestions, I'll try them.

I'm kind of new to the Maple and do not undertand why the plots have different formating in my file. can you  check if it can be me (my poor programming) causing such strange efffects in my file?

PT_LIN.mw

thanks in advance

Wojtek