>Hi, we've just installed Microsoft Visual Studio which includes VFoxPro >5.0a. The application was completely recompiled and a new "exe" was >created. On the development PC the application works perfectly with >"cipher50.fll". Using the Setup Wizard the application was installed on a >PC which had no previous version of VFoxPro. Here the application bombs out >with the message that the "library cipher50.fll is invalid". Has anybody >got any idea why? > > That library is looking for a DLL that is missing. See below. // Tech Note: On some Windows 95 PCs when you issue the command: // // SET LIBRARY TO cipher50.fll // // you may experience an error similar to: // // Error 1691 - Library file Cipher50.FLL is invalid. // // The error is a result of the Windows PC not having MSVCRT.DLL installed // in its SYSTEM directory. The problem does not occur with Windows NT. // Microsoft states that MSVCRT.DLL is required with multithreaded .DLLs // [or .FLLs] by design. However, it is not shipped with all O/S products. // // Microsoft ships this .DLL with Windows NT 4.0, OEM Service Release 2 of // Windows 95 (OSR 2), and MS VC++ 4.2 and higher. It does NOT ship with // the original version of Windows 95, the Windows 95 Upgrade, the Win95 // Service Pack 1, or VFP 5.0. // // MSVCRT.DLL [version 5.0.7022] is now included with CIPHER50.ZIP. If you // distribute CIPHER50 enabled applications with the VFP 5.0 Setup Wizard, // remember to direct MSVCRT.DLL to WinSysDir in step 6 of the Setup Wizard. // // Occassionally, there may be difficulty installing a .DLL in the SYSTEM // directory due to the .DLL being in use at the time of a new install. // However, installing this particular .DLL should be fairly painless since // it is not one of the active .DLLs that is always [or often] running. The // fact that it is not part of the original version of Windows testifies to // this. // // As another work around for a Windows 95 PC that does not have MSVCRT.DLL, // copying MSVCRT40.DLL to MSVCRT.DLL in the SYSTEM directory has been known // to work. // // Refer to the MS Knowledge Base Article Q157317 for additional information // regarding .FLLs and MSVCRT.DLL. ==Carl