Quantum performs validity checks on weight matrices and provides information when certain weight matrix errors are detected. When one of these errors is detected, a message is displayed and, by default, the Quantum run stops. You can see further details of the error in the weighting report file.

If you would prefer the run not to stop when one of these errors is detected, you can use the nowmerrors keyword on the a statement or the wm statement. When you do this, the run continues with a warning. However, you can still find the additional information in the weighting report file.