Error during modelling

I do not know what is wrong

when I had started to use shells then problem appeared

This is usually related to a bug. It is hard to determine what is wrong. Maybe when something was deleted, some tracks remained. Or you opened the model with different versions of PrePoMax. If I could look into the .pmx file I could tell you more.

sory but I can not send model - company policy
best regards

I have used only version PPM 1_3_5_1 for this model I have noticed when I’m staring using shells and add constraints then the bug appears for solids ppm works fine but then I have problem with memory error . Also in the past I had bug problems when using mixed solid shell model especially when creating constraints then begin bugs
best regards