For Easytrieve to recognize the file format of a C-ISAM INDEXED file, you must supply a file descriptor. The file descriptor provides the Z format that is required to determine which type of INDEXED file you are processing.
Easytrieve Report Generator, non-mainframe environment
Code the following where filename is the name of your C-ISAM file:
FILE filename SYSNAME 'filename[Z:CISAM]'
If you don't have SYSNAME, then you will need your environment variable set to
filename='xxx/xxx/filename[Z:CISAM]'