I've submitted the changes below as a bugfix, but it is simple enough that it could probably be easily applied to c36b1 and later CHARMM releases. The two changes in correl.src allow time series names to be up to 8 chars in length, instead of 4 chars. The first fix is for the parsing of the ENTER command; the lines marked with a plus (+) replace those marked with a minus (-):

Code:
@@ -240,9 +241,9 @@
        ! PROCESS-ENTER-COMMAND
 
        CALL NEXTWD(COMLYN,COMLEN,WD,WDMAX,WDLEN)
-       IF(WDLEN > 4) CALL WRNDIE(0,'<CORREL>', &
-            'ENTER name too long, truncated to 4 characters.')
-       NAME=NEXTA4(WD,WDLEN)
+       IF(WDLEN > 8) CALL WRNDIE(0,'<CORREL>', &
+            'ENTER name too long, truncated to 8 characters.')
+       NAME=NEXTA8(WD,WDLEN)
        !
        WD=NEXTA4(COMLYN,COMLEN)
        !

The other change is in a function which does a lookup of the name:

Code:
@@ -1132,7 +1178,7 @@
       ELSE
          I=0
          DO J=1,NSERIE
-            N=4
+            N=8
             CALL TRIME(SNAME(J),N)
             IF(EQST(WD,WDLEN,SNAME(J),N)) THEN
                I=J


Rick Venable
computational chemist