FATAL 2: open of pg_clog error

Hi,

we are using Postgresql 7.2 on 2.4.17 SMP.

since this morning we are getting this error message while vacuuming:

2002-03-05 12:42:08 DEBUG: --Relation pg_toast_16854--
2002-03-05 12:42:10 FATAL 2: open of /raid/pgdata/pg_clog/0202 failed: No
such file or directory
2002-03-05 12:42:10 DEBUG: server process (pid 14201) exited with exit code
2
2002-03-05 12:42:10 DEBUG: terminating any other active server processes

A quick search in the archives
(http://archives.postgresql.org/pgsql-bugs/2002-01/msg00066.php) showed that
Tom fixed a potential problem in src/backend/utils/time/tqual.c v 1.46, but
7.2 has v 1.49 already.

We are vacuuming several tables every 5 minutes. A vacuum analyze brings up
the same error.

Any hints besides doing an initdb?

Greetings,
Bjoern

PS: ls -la /raid/pgdata/pg_clog gives this:

drwx------ 2 postgres postgres 4096 Mar 4 23:48 .
drwx------ 6 postgres postgres 4096 Mar 5 12:18 ..
-rw------- 1 postgres postgres 262144 Feb 14 12:52 0006
-rw------- 1 postgres postgres 262144 Feb 14 17:57 0007
-rw------- 1 postgres postgres 262144 Feb 14 22:10 0008
-rw------- 1 postgres postgres 262144 Feb 15 11:57 0009
-rw------- 1 postgres postgres 262144 Feb 15 17:25 000A
-rw------- 1 postgres postgres 262144 Feb 15 22:33 000B
-rw------- 1 postgres postgres 262144 Feb 16 12:51 000C
-rw------- 1 postgres postgres 262144 Feb 16 17:40 000D
-rw------- 1 postgres postgres 262144 Feb 16 23:01 000E
-rw------- 1 postgres postgres 262144 Feb 17 13:13 000F
-rw------- 1 postgres postgres 262144 Feb 17 17:31 0010
-rw------- 1 postgres postgres 262144 Feb 17 21:27 0011
-rw------- 1 postgres postgres 262144 Feb 18 10:44 0012
-rw------- 1 postgres postgres 262144 Feb 18 16:44 0013
-rw------- 1 postgres postgres 262144 Feb 18 20:43 0014
-rw------- 1 postgres postgres 262144 Feb 19 06:50 0015
-rw------- 1 postgres postgres 262144 Feb 19 15:52 0016
-rw------- 1 postgres postgres 262144 Feb 19 19:59 0017
-rw------- 1 postgres postgres 262144 Feb 20 00:23 0018
-rw------- 1 postgres postgres 262144 Feb 20 14:33 0019
-rw------- 1 postgres postgres 262144 Feb 20 18:37 001A
-rw------- 1 postgres postgres 262144 Feb 20 22:33 001B
-rw------- 1 postgres postgres 262144 Feb 21 12:53 001C
-rw------- 1 postgres postgres 262144 Feb 21 17:16 001D
-rw------- 1 postgres postgres 262144 Feb 21 20:58 001E
-rw------- 1 postgres postgres 262144 Feb 22 05:36 001F
-rw------- 1 postgres postgres 262144 Feb 22 15:42 0020
-rw------- 1 postgres postgres 262144 Feb 22 19:40 0021
-rw------- 1 postgres postgres 262144 Feb 23 00:20 0022
-rw------- 1 postgres postgres 262144 Feb 23 13:28 0023
-rw------- 1 postgres postgres 262144 Feb 23 17:47 0024
-rw------- 1 postgres postgres 262144 Feb 23 23:35 0025
-rw------- 1 postgres postgres 262144 Feb 24 12:52 0026
-rw------- 1 postgres postgres 262144 Feb 24 16:45 0027
-rw------- 1 postgres postgres 262144 Feb 24 20:25 0028
-rw------- 1 postgres postgres 262144 Feb 25 00:20 0029
-rw------- 1 postgres postgres 262144 Feb 25 15:18 002A
-rw------- 1 postgres postgres 262144 Feb 25 19:02 002B
-rw------- 1 postgres postgres 262144 Feb 25 22:15 002C
-rw------- 1 postgres postgres 262144 Feb 26 11:35 002D
-rw------- 1 postgres postgres 262144 Feb 26 16:35 002E
-rw------- 1 postgres postgres 262144 Feb 26 19:45 002F
-rw------- 1 postgres postgres 262144 Feb 26 22:55 0030
-rw------- 1 postgres postgres 262144 Feb 27 13:40 0031
-rw------- 1 postgres postgres 262144 Feb 27 17:34 0032
-rw------- 1 postgres postgres 262144 Feb 27 20:55 0033
-rw------- 1 postgres postgres 262144 Feb 28 01:31 0034
-rw------- 1 postgres postgres 262144 Feb 28 15:33 0035
-rw------- 1 postgres postgres 262144 Feb 28 19:11 0036
-rw------- 1 postgres postgres 262144 Feb 28 22:36 0037
-rw------- 1 postgres postgres 262144 Mar 1 12:29 0038
-rw------- 1 postgres postgres 262144 Mar 1 16:59 0039
-rw------- 1 postgres postgres 262144 Mar 1 21:27 003A
-rw------- 1 postgres postgres 262144 Mar 2 09:23 003B
-rw------- 1 postgres postgres 262144 Mar 2 15:20 003C
-rw------- 1 postgres postgres 262144 Mar 2 20:03 003D
-rw------- 1 postgres postgres 262144 Mar 3 03:14 003E
-rw------- 1 postgres postgres 262144 Mar 3 14:39 003F
-rw------- 1 postgres postgres 262144 Mar 3 18:25 0040
-rw------- 1 postgres postgres 262144 Mar 3 21:56 0041
-rw------- 1 postgres postgres 262144 Mar 4 09:41 0042
-rw------- 1 postgres postgres 262144 Mar 4 16:22 0043
-rw------- 1 postgres postgres 262144 Mar 4 19:57 0044
-rw------- 1 postgres postgres 262144 Mar 4 23:48 0045
-rw------- 1 postgres postgres 155648 Mar 5 12:54 0046