HP Guardian Errors Manual page 27

If a call to OPEN returned this error, check the flags parameter. If a call to FILE_OPEN_ returned
this error, check the options parameter.
25 (%31)
Cause A process called AWAITIO[X] or CANCEL for a file opened for waited I/O.
Effect The procedure sets the error code and returns without performing the requested operation.
Recovery Either open the file for nowait I/O, correct the file number, or make another correction
appropriate to the application.
26 (%32)
Cause A process called AWAITIO[X], CANCEL, or CONTROL 22, but no I/O requests were
outstanding on the file; or a process called FILE_COMPLETE_ with a timeout value of - 1 (wait
indefinitely) but no I/O had been initiated.
Effect The procedure sets the error code and returns without performing the requested operation.
Recovery Corrective action is application dependent.
27 (%33)
Cause A process tried a waited operation on a file that was opened for nowait I/O, and outstanding
nowait I/O requests were pending on that file.
(Note that some operations cannot be performed nowait, such as SETMODE, POSITION,
KEYPOSITION, or SETPARAM.)
Effect The procedure sets the error code and returns without performing the requested operation.
Recovery Corrective action is application dependent.
28 (%34)
Cause This error can occur for any of the following reasons:
A nowait I/O request brought the number of outstanding nowait requests on the given file to
a value greater than the maximum nowait depth specified when the file was opened.
An attempt was made to open a disk file or the $RECEIVE file with a maximum number of
concurrent nowait operations greater than 1.
An attempt was made to add more than the configured maximum number of subdevices for
an I/O process.
The sync depth exceeds the number the opener is prepared to handle.
Effect The procedure sets the error code and returns without performing the requested operation.
AWAITIO[X] or CANCEL attempted on
file opened for waited I/O.
(device type: any)
AWAITIO[X] or CANCEL or CONTROL 22
attempted on a file with no
outstanding I/O requests.
(device type: any)
An operation was attempted with
outstanding no-waited I/O
requests pending. (device type: any)
The number of outstanding nowait operations
would exceed that specified; an attempt
was made to open a disk file or $RECEIVE
with the maximum number of concurrent
operations more than 1; an attempt to ADD
more than the configured maximum number of
subdevices for an I/O process; or sync depth exceeds
number the opener can handle; or trying to run more
than 254 processes from the same object file. (device type: any)
Error Code Descriptions 27