Very strange. I tried to compile exactly the same flightplans as yours:
AC#1,FG_11,60%,1hr,VFR,00:00:00,00:27:20,250,R,0001,EHBG,00:30:00,00:57:20,250,R,0000,EHAM
AC#2,FG_13,90%,1hr,VFR,00:00:00,00:27:20,250,R,0001,EHAM,00:30:00,00:57:20,250,R,0000,EHBG
AC#3,FG_14,90%,1hr,VFR,00:00:00,00:27:20,250,R,0001,EHBG,00:30:00,00:57:20,250,R,0000,EHAM
I got no error. If there would be no space between EHAM and AC#2, the error message would specifically mention it. The three aircraft are just fake aircraft.txt entries. I don't have them.
Bernard