The flag IEX can have value -10. This value seems to be associated with secondary particles. At the moment IEX is given output format I2. See FRMFAI.H line 34. This should be changed to I3 to accommodate IEX = -10
The modification required is
- 1 A1,1X,I2,1P,7E16.8,
+ 1 A1,1X,I3,1P,7E16.8,
I should point out that this bug was submitted by me. I forgot to log in beforehand.
David