As FunkyMonk has remarked, the format of your input file (primarily space-separated) doesn't match the way you split each line into fields (split on ";"), so it is not surprising that some of the fields come out undefined.

Moreover, you say:

Here is my output file 

 
            DAL11    527    530     3
            
ACA87    531    533     2
            
SHT8K    528    535     7
            
DLH9F    533    537     4

[download]
...but the typical print statement in your program is 
print OUTFILE "$aircraft_id;$ATO_min;$CTO_min $delay_ATO_CTO_m";

[download]
 That would print a semicolon-separated output, not the space-separated one you present. You need to reconcile your separators.

Anno

In reply to Re: warnings unexpecetd by Anno
in thread warnings unexpecetd by steph_bow

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