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This error means that no more three winding transformers can be added to the case. I'm not sure how to find the upper limit of this table. I encountered this error while trying to add several thousand 3 winding transformers to a case instead of only a few. Lets hope I don't make the same mistake again.

This error means that no more three winding transformers can be added to the case. I'm not sure how to find the upper limit of this table. I encountered this error while accidentally trying to add several thousand 3 winding transformers to a case instead of only a few. Lets hope I don't make the same mistake again. again.

A table of the maximum number of each type of transmission component allowed in a case can be found in the Program Operations Manual (POM), normally under the name of "Standard Maximum PSSE Program Capacities".

The capacities for each component are a function of the maximum number of buses allowed for that case.

For my case (set to a maximum of 4000 buses), I was only allowed 400 three winding transformers, hence the error.