To:  The Public

From:  Gary Sidder

Subject:  Corrections to Petro.exe

After downloading Petro.exe, apparently in moving from DOS to UNIX and back, two of the graph names in PETRO.CALC.PLOT are changed.  MG#SI.XLC becomes MG_SI.XLC, and TIO2MG#.XLC changes to TIO2MG_.XLC.  Currently, the macro mxygraph.xlm returns an error message that it can't find the two files.  Rather than change the macro, just correct the two file names using File Manager in Windows or DOS.  Replace the underline with the # (pound or number) symbol.