
When a negative return value of a FAX action indicates that an error has occurred, use the following list of return values to determine the cause of the error. These values are found in the fax_tool.h file.
Value  | 
Meaning  | 
-1  | 
Another faxit command is executing.  | 
-2  | 
Fax transmission failed (internal).  | 
-3  | 
Channel was denied (internal).  | 
-4  | 
File cannot be opened or does not exist  | 
-5  | 
There are no previous queued faxes.  | 
-6  | 
No background file was found (obsolete).  | 
-7  | 
No foreground file was found (obsolete).  | 
-8  | 
faxit command timed out (internal).  | 
-9  | 
File linking failed (obsolete).  | 
-10  | 
File opening failed (obsolete).  | 
-11  | 
File queued before fax (obsolete).  | 
-12  | 
Cannot set timer (internal).  | 
-13  | 
File was not specified.  | 
-14  | 
Unix call failed (internal).  | 
-15  | 
Destination was not supplied.  | 
-16  | 
Mode, for FAX_CNG, not supplied (obsolete).  | 
-17  | 
Command was not supplied.  | 
-18  | 
Return string was not supplied.  | 
-19  | 
Cover page merging failed (internal).  | 
-20  | 
Subprog to sbFaxHpr failed (internal).  | 
-21  | 
IRAPI call failed (internal).  | 
-22  | 
faxmastr file open error occurred (internal).  | 
-23  | 
Wrong subprog message was received (internal).  | 
-24  | 
Max. sbFaxHpr instances was reached (internal).  | 
-25  | 
Fax file is a big endian fax file.  |