Finished with errors(code=12)

Dear experts,
When I run the file ,it gives “finished with errors”[code 12],please help me to find why,Thank you!
0726.flair (2.4 KB)

Please read the error messages at the end of the .err and .out files:

*** Nonsense compound card, fraction 0.00000000000000 of medium 29 for compound MIX ***

This points to a mistake in your COMPOUND card defining the MIX material: indeed the SULFUR fraction is left blank. Also, in the Elements field displayed by the Flair visualization of that card, select 4…6, since you input four components.

A post was split to a new topic: Simulation not generating anything