No matching prototype available

[broche]

Hi - Basic question but do not remember solution

NT 8.15
CL 9.0

Getting the following compile error
No matching prototype available

On Line: Start(SendEmail,25000,email)
Using SendEmail(email) works fine (Except a warning - Calling function as procedure)

Both called from within a routine on a form at Validate Record.

What am I doing wrong?

Thanks.

[Bruce]

a) Does the SendEmail procedure have the "Declare Globally" switch on?
b) What is the prototype of SendEmail?

cheers
Bruce