>>A form which has been working fine up till now is coming up wth the following error
>>
>>expression is invalid - use a valid expression for dynamic backcolor property - OK Cancel
>>
>>I know I can correct the error by rebuilding the form but is there an easy way to find out what is causing it and how to correct it?
>
>Did you even set the DynamicBackColor property anywhere? Can you find what the expression is, that Visual FoxPro finds offensive?

I'm using = Grid Highlighter by Nick Neklioudov - I don't know whether that would be causing a problem