A few months ago I started to use GID12.0.7, in the postprocess when I want to view results using “contour fill” or “contour lines”, an error always appear as the attachment, but this was not the case for the older Gid versions like Gid 8.0-10.0.
Could you find the solution for this problem?
Please, try with the current version 13 (13.0.1 official and/or 13.1.1d), coud try a temporary free password if necessary.
If the problem also happen with some of these versions send us the example to fix it.
(e.g. upload a zip to this forum or send us directly if it is confidential or too big)
There are also some more modern 12.x version that the one used by you: 12.0.10 official and 12.1.11d developer (to allow use a GiD 12.x licence)