Why are the results different than they were before?

If you are getting different analysis results than you were before for the same analysis scenario, there are several main causes.

1.  The input data may be different, or the analysis parameters may be

To determine what may be different in your input data, you will need to compare the two Command Files ([RUNNAME].CMD).  There is an excellent shareware program called VMERGE or VisualMerge which is very useful for this.  You can do a web search and download it.

2.  The analytical methodology may have changed.

If the input file (.CMD) was identical, and the only difference was the HydraEng.DLL version, then it is possible the difference in results is caused by changes in analytical methodology.  If the differences are significant, contact Pizer Technical Support to discuss 206-634-2808.