I had such problems. I tried to avaoid it this way. All my custom packages functions will return me two variable instead of one.
#Function inside a package
open(FILE,"filename") || return (1,"Error while trying to open the fil
# Main Program
Now based on the return value i decide to print the error or take corr
There are lot of other ways to do it too. But i found this to be easier for me.
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