Where can a parameter be used that prevents me deleting a parameter? I've looked everywhere. The parameter has the green tick next to it. I'm using this as a template for it, and have to get rid of lots of stuff

Layout
Formulas - scrubbed loads of them
No groups here
All I can see is a sub-report here. It wouldn't hold me back from deleting the parameter until it's run, will it? This is design phase

Can I force to remove the parameter, without the warning message?

Thanks

If the parameter is used in the report or subreports through the subreport linking option it cannot be deleted until it has been removed from the report itself.

Try changing the parameter type

i.e. if the parameter type is a string change it to a number

and then run the report. This will usually trigger an error message and show you the place where it is being used.

Possible places to look
* formulas
* section expert
* record selection
* subreport linking

Hope this helps.

Sarah