11 November 2017 1 4K Report

Hi!

So i have implemented the scatterer on a substrate model to AC/DC Module as at the moment we do not have a wave optics module here available. The model in the beginning works just fine, but sometimes if I import a new scatterer geometry or just rotate a scatterer on the substrate I get the following error... Unable to use old solution format - you need to recompute the solution. Wrong number of DOFs in linearization point... Or a very similar cryptic error message, which does not give any info. I have tried to search for a solution in comsol forums and in the help center, but nobody sees to have a solution for it the solution offered in the comsol website does not manage to solve it. It sometimes just randomly disappears (when change the meshing minimally or sometimes clear the previous results or remove/change a nm to m or smth like that or change the solver). Then it randomly works and randomly stops working again. This has been going on now for several months and it is frustrating.... at the moment I work on a 5.2a version. But the similar random error has bugged a lot of people and over several comsol versions.

Any hints and info appreciated!

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