FUNL0042 I/O error for (ddname), Table (t) Page (p)(-lastpg), at cylinder (cyl) track (trk).

An I/O error occurred for the database indicated by ddname at the indicated cylinder and track, trying to read table t (0=FCT, 1=Table A, 2=Table B, 3=Table C, 4=Table D) and page p. This could be caused by an erroneous DD card or FILEDEF command, hardware problems, or a corrupted database file. Verify the DD card or FILEDEF command. If they seem valid try to examine the indicated extents with either Model 204 or some other utility (DFDSS or DDR). Check your EREP logs for DASD I/O errors. For more help call Rocket Software technical support.

If the read is for multiple Table B pages (for example, a track of pages when SBBUF=1), the number of the first page being read (p) is followed by the last page number in the group of pages. This may be able to assist you in diagnosing the problem in the file. For example, the following message:

I/O error for MYFIL, Table B Page 451-457, at cylinder 2165 track 0.

indicates that the error may have been in any of the 7 pages 451 through 457. You can use Model 204 to try to examine the records on these pages: multiply the page numbers by the BRECPPG parameter of the file, and the result is the mimimal and maximal numbers of the Model 204 records which may be contained in the group of pages.