VBA out of stack space

I am looking to use worksheet_change to check a cell once it is changed and then carry out a series of processes on related cells if the cell in question is now blank. SO the idea is if the first column (B in this case) is blanked (it would usually show a date) then the value of a check box is changed (column R is where the linked cell is).

The code is as follows:

Please Login or Register  to view this content.

This works fine if the cell contains anything. But if I edit the cell, remove the date and hit return I get an out of stack space error at the If stage. Is there a problem evaluating a blank cell or something?

As always thanks in advance.

Of course it does. Duh! My next step was to restrict the change checking to only column B which would of course sorted this as well. Some days are just like that! Thanks very much for your incredibly swift help.