Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

248 Chapter9
Intrinsics Reference (cont)
FOPEN
CCG Not returned by this intrinsic.
CCL Request denied. This can occur because another process
already has EXCLUSIVE or SEMI-EXCLUSIVE access
for this file, the privilege level of this file is not “user”
(3), or an initial allocation of disk space cannot be made
due to lack of disk space. If the file is not opened
successfully, the file number value returned by FOPEN
is 0. Call the FCHECK intrinsic for more details.
Additional Discussion
See the MPE/iX Intrinsics Reference Manual and Accessing Files
Programmer’s Guide.