Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

 
Error 89:  Cannot write expressions of this type
 
The Write and Writeln statements can print only numeric,
string, and Boolean data. A command to print a complex or
user-defined data type such as a record, set, pointer, or
enumeration has been entered; this cannot be done.
 
Convert the value to a string and then print the string.