Type the onpload -f flags
When you combine -f flags into one group, do not put spaces between the flags. For example, use -f acq.
If you prefer, you can use multiple occurrences of the -f option instead of combining all of the possible -f flags into one group. For example, the following
two command lines are equivalent:
onpload -m mymap -d mydev -flnc
onpload -m mymap -d mydev -fl -fn -fc