Hello,
where is your "System450.sbp" located? I would suggest to specify the fully qualified pathname. For example:
call "C:\Program Files (x86)\Lindersoft\SetupBuilder 10 Developer\SB10.EXE" /CS "c:\yada\System450.sbp" /LX Public
Does this help? If there is still an issue, please send your System450.sbp project file to our support [at] lindersoft [dot] com and we'll check it (we'll be back from vacation on next Monday).
Thanks,
Friedrich