Some follow up. Long path names was already active, so it was not the cause. We reinstalled the infrastructure on Windows 2019 Standard, with as many change during the installation, as we can, but we faced the same issue. After investigating more, we found that the semantic modeler was not able to save the models. We found…

Dear Gianni, thank you for your suggestions. I've checked the folder you mentioned and the bad news is I've found files for each of the working models, but haven't found any files for the erroneous models. So the reason is that the files somehow got lost. Both meta and the zip. And there is no good news. You're right,…

Thank you for the answers. Regarding to the first problem. I'm not able to open them. It can happen with any model. Therefore I'm not able to export them or do a consistency check. Command line tools, like downloadrpd, works on the deployed model. Anyway these models were went through consistency check, there are reports…