transition condition non intuitive error message

hello

as part of my workflow i created a transition and created condition to it.

my problem is that the user that try to use this transition (if not pass the consition) recieve an non intuitive error message

my condition verify the location of the file.

i would like to know if i can give my users an intuitive message so they could change all the needed changes and resend the object for the transition.

now they only know that they cant continue but dont actually know WHY....

thanks

Dan