I have a sharepoint designer workflow in SP2010.I have one lookup column and some projected columns from this lookup which i have to include while sending an email.But these fields are optional and may be blank.Now if any lookup column is blank then SPD workflow fails to check empty condition and throws following error
Coercion Failed: Unable to transform the input lookup data into the requested type.
When any of projected column is blank still it contains value something like 90;# where 90 is the ID of item of list on which lookup is present.
Is there any way to check whether lookup column is empty?