A rule disallowed in modules has been encountered.
#2156 Compile-time error
A rule disallowed in modules has been encountered.
Additional Information
The rule is 'X'.
Explanation
Certain rules and declarations are allowed only in the main
program. These are
process , break-width , no-default-io ,
data-letters, declare #main-output has , declare #error has , declare #main-input has , declare #process-input has , declare #process-output has ,
binary-input , binary-output , delimiter , and
symbol .