File dialog "cancel" appends data

[Will3001]

Hello,

  I'm running a VI measuring I_V data. All fine until I get to the part where the program askes if I want to "replace" or "cancel", i.e replacing, substitutes the current data for the original in the file but canceling seems to append the data to the file. This is not very useful. Have I written the code wrong or can someone suggest a fix

Thanks

Will.

[JB]

Attached example should solve your problem.

[Will3001]

Very neat, Thank you.

Will.