diff --git a/mediachanger/castorrmc/common/serror.c b/mediachanger/castorrmc/common/serror.c
index 80961b88a01fe48dc4159ba9043daab1f84a1fd9..613edd25d107f16ad0074312356da3b803cba32f 100644
--- a/mediachanger/castorrmc/common/serror.c
+++ b/mediachanger/castorrmc/common/serror.c
@@ -69,6 +69,7 @@ char    *sys_serrlist[SEMAXERR-SEBASEOFF+2]=
    "Mismatch",
    "Request failed",
    "Invalid number of arguments",
+   "Already initialized",
    "BAD ERROR NUMBER"
   };
 
diff --git a/mediachanger/castorrmc/h/serrno.h b/mediachanger/castorrmc/h/serrno.h
index a8aa640e9867e8746b6ea8214691caeb8ca45db6..99305450cd6322e73bf41f3c093676615196f7b3 100644
--- a/mediachanger/castorrmc/h/serrno.h
+++ b/mediachanger/castorrmc/h/serrno.h
@@ -80,8 +80,9 @@
 #define SEMISMATCH      SEBASEOFF+46    /* Mismatch                     */
 #define SEREQUESTFAILED SEBASEOFF+47    /* Request failed               */
 #define SEINVALIDNBARGS SEBASEOFF+48    /* Invalid number of arguments  */
+#define SEALREADYINIT   SEBASEOFF+49    /* Already initialized          */
 
-#define SEMAXERR        SEBASEOFF+48    /* Maximum error number         */
+#define SEMAXERR        SEBASEOFF+49    /* Maximum error number         */
 
 #define SERRNO  (serrno - SEBASEOFF)    /* User convenience             */
 /*
diff --git a/mediachanger/castorrmc/h/serrno.man b/mediachanger/castorrmc/h/serrno.man
index cb1d5a56f329d6556e4301d7750ef8709e0542e0..07f48741a6abac4767ec0ed5bf3b99ae5621ef04 100644
--- a/mediachanger/castorrmc/h/serrno.man
+++ b/mediachanger/castorrmc/h/serrno.man
@@ -199,6 +199,9 @@ The following error values might be returned by any package:
 .TP
 .B SEINVALIDNBARGS
 (1048) Invalid number of arguments
+.TP
+.B SEALREADYINIT
+(1049) Already initialized
 
 .SH COPYTAPE ERRORS
 None yet