I am trying to develop a new language with GUI using OCaml.

However, the language seems to be not very stable.

If a small syntax error in the program(written in this new language) happens,

it can through an error message.

If the syntax error is kind of critical, 

(e.g., a semi-colon is missed at the end of a line, 

 or a keyword is mis-spelled)

Then the whole GUI of the language crashes.

Does anyone else have ever encountered similar problem?

Or can anyone give me a hint on how to prevent this?

Thanks a lot!

Angela

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Dept. of CS, Rice Unitersity

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