What does it mean when we get the error message "Invalid
report version" when try to open a Crystal Report?

Answer Posted / mlmcc

Crystal in its evolution has changed the report file format
several times.

In most cases the file format is FORWARD-compatible. By
this I mean a file created in Crystal 6 can be opened in
Crystal 6 or higher.

When the file format changes were major the format is not
BACKWARD-compatible. By this I mean a file created in CR 9
cannot be opened in CR 8 or before.

Crystal changed the report file format with CR 8 and CR 9.
The CR 9 change was because of the introduction of unicode
support.

CR 8 has the ability to save a file in CR 7 format.
Because of the support for unicode CR 9, 10, and XI cannot
save the file in previous formats.

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