Count if Null Expression

[Huddle]

I have an expression in an unbound field on a report. I'm getting a syntax error. I need it to count the 'Command' data if it is null or contains a 0.

=Count(IIf(IsNull[command],0,(IIf([Command]=0,0))))

Where am I getting it wrong

[pbaldy]

No parentheses for the IsNull function:

IsNull(Whatever)

[Huddle]

thanks for your help

[pbaldy]

No problem.