52 ERROR WRITING CACHE

    Problem : While trying to make a cache buffer available, Btrieve tried to write data to a logical disk drive from a file that was previously opened in accelerated mode. An I/O error occurred during a write.

    Solution : 

54 VARIABLE PAGE ERROR

    Problem : During a Step Direct operation, Btrieve could not read all or part of the variable length portion of a record. In this case, Btrieve returns as much data as possible to your application. This error usually indicates file damage to one or more pages in the file.

    Solution : 

57 EXPANDED MEMORY ERROR

    Problem : This error is applicable only in the client-based DOS environment. Btrieve returns this status if it receives an error from the Expanded Memory Manager. This error usually means that Btrieve was unable to save or restore the memory mapping register context, indicating an incompatibility with another application that uses expanded memory. 

    Solution : Make sure the following lines entered in config.sys :

device=c:\windows\himem.sys
device=c:\windows\EMM386.exe noems ( must have the noems parameter )
DOS=HIGH,UMB