Hans, > Coin6001E Unable to open mps input file ..\Mps\Netlib\exmip1.mps I believe you are getting this error message because your working directory is not correct. The working directory should be ..\..\coin JP Fasano jpfasano at us.ibm.com (914)945-1324 (tie line 862-1324) COIN-OR www.coin-or.org