Qatium accepts only valid .inp files per EPANET 2.2 standards. If your .inp file runs in EPANET 2.2 but the problem persists, we’ll review the model and make the adjustments for it to work.
The problem may also be that asset IDs are too long. Qatium and EPANET 2.2 only support 31-character IDs, so if you are exporting from EPANET 2.0 or other software vendors to .inp, make sure IDs don't exceed that length.
If you need help, please contact us.