I have cells where I am trying to eliminate text after the dash, but it gives
me errors if the cells does not contain a dash. How can I have it just give
me what is in the cell if no dash is found?

For example (the first one gives it to me correctly, but the second one
finds an error)
NL RISON KANTOOR ITEMS-SCHAGEN NL RISON KANTOOR ITEMS
NL PEJO ELECTROSERVICE B V #VALUE!

My formula reads
=TRIM(LEFT(B2,FIND("-",B2)-1))