6027-930 [W] Attention: In RULE 'ruleName' LIST name 'listName' appears, but there is no corresponding EXTERNAL LIST 'listName' EXEC ... OPTS ... rule to specify a program to process the matching files.
Explanation
There should be an EXTERNAL LIST rule
for every list named by your LIST rules.
User response
Add an "EXTERNAL LIST listName EXEC scriptName OPTS opts"
rule.
Note: This is not an unrecoverable error. For execution with -I
defer, file lists are generated and saved, so EXTERNAL
LIST rules are not strictly necessary for correct execution.