ISO Pascal reference manual

PROGRAM fail;
TYPE tiny = 1..10;
VAR r : PACKED RECORD a : array[1..5] OF tiny END;
PROCEDURE test(VAR x : ARRAY {low..high:integer] OF tiny);
BEGIN
END;
BEGIN
END.
test(r.a) (r.a is packed}
*ERROR 49 -- data cannot be output from an object of this type
Appendix A
A WRITE or PUT statement has attempted to output data from an object
which cannot generate values, for example a PROCEDURE or a TYPE.
PROGRAM fail(output);
VAR x : SET of char;
BEGIN
END.
y : RECORD z : integer END;
write(x); (wrong}
write(y.z); (ok}
write(y); (wrong}
*ERROR 50 -- a field width specification is not allowed here
This message is issued when a parameter to write or writeln is followed by
more field width specifications than are required.
PROGRAM fail(output);
VAR x : char;
BEGIN
END.
x := '?';
writeln(x:1:2); (only one field needed}
*ERROR 51 -- an item to be output is required here
The procedure WRITE must be given at least one value to be output. Note
that WRITELN may be specified without any parameters.
Pascal Issue 1 61