- Transient Stability: Fixed error with reading/write the model REGCA1 from the DYR file. The REGCA1 model has the parameter Accel as the last parameter in the parameter list. Simulator was reading that parameter in our parameter Xe which represents an additional source impedance for the model. This was incorrect. It has been fixed so that when reading the REGCA1 model we will ignore the Accel parameter as we do not use nor store it and when writing out the REGCA model we will always write an Accel value of 0.8.