6100 ADCCP Programming Manual

File-System Error Codes

A–4 069225 Tandem Computers Incorporated

File-System Error

Codes

This subsection lists the file-system error codes and gives some hints for recovery.

Table A-1 lists error codes that are serious. If your application receives these codes, do

not retry the operation.

Table A-1. File-System Error Codes– Do Not Retry(Page 1 of 2)

Error

Code Description/Solution

2 Invalid operation requested. You probably issued a call CP6100 doesn’t support.

Remember to use WRITEREADs for all requests to the line.

12 Device has been opened exclusively. The device is in use by another application. If other

applications use the line, or if your application opens the line more than once, make sure

you specify shared access in every OPEN call. If another application has the line open

exclusively, you must wait until that application closes the line.

14 Device does not exist. The line you named is not known to the system. Check your

spelling, and make sure the name is properly qualified, that is, that the system name is

correct.

21 Invalid count field in request. This message can mean one of the following:

The READ or WRITEREAD buffer is too small. It must be at least eight bytes long.

The write count parameter in the WRITEREAD call is not equal to the value in the Text

Out field plus 8.

The read count parameter in the WRITEREAD call is not equal to the value in the Text

In field plus 8.

The protocol task made an error in its response to CP6100 by delivering more or fewer

characters than it said it was delivering or by reporting a frame size that doesn’t match

the application request.

First check your program to see that your file system call was valid. If you suspect the

protocol task to be at fault, ask the system operator to stop the line and download the line

interface unit. If the problem persists, contact your Tandem representative.

22 Invalid request ID. The request ID in the WRITEREAD buffer is 0 or negative. Change it to

a number from 1 through 32767. (CP6100 does not check for duplicate request IDs. Your

application must manage its own request IDs in coordination with other applications using

the line.)

53 File-management interface error. Your application probably issued another request after

closing the line. Open the line again, and then repeat your request.