I'm trying to migrate an existing Cobol application using C-ISAM as data layer to Pervasive. I've installed successfully the rmbtrv32.dll which translates the Cobol commands in appropiate Btrieve commands. I've uploaded the Cobol data from the C-ISAM file into a table in Pervasive. However when I try to execute Cobol code now I do get the Cobol Runtime error 3950: something about invalid number of keys or invalid sequence of the keys. Indeed the Cobol C-ISAM files do have alternate keys, which I tried to create as secondary indexes on my Pervasive table, but still I receive the same error message. Anybody ideas what I'm missing?