FVXX27 KNES 191645
VA ADVISORY
DTG: 20240319/1645Z
VAAC: WASHINGTON
VOLCANO: TEST 999999
PSN: N3700 W07700
AREA: US
SUMMIT ELEV: 32805 FT (9999 M)
ADVISORY NR: 2024/001
INFO SOURCE: TEST
ERUPTION DETAILS: TEST AT 19/1700Z
OBS VA DTG: 19/1645Z
OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE
DATA.
FCST VA CLD +6HR: 19/2300Z NO VA EXP
FCST VA CLD +12HR: 20/0500Z NO VA EXP
FCST VA CLD +18HR: 20/1100Z NO VA EXP
RMK: THIS IS A VA ADVISORY TEST MSG. MWO TAHITI
SHOULD NOW ISSUE A SIGMET TEST MSG FOR VA
ADVISORY IF RECEIVED. ...KIBLER
NXT ADVISORY: NO FURTHER ADVISORIES
The VAA TAC decoder halts with a message
2024-03-20 21:52:07,819 - tac_to_xml.vaa.vaaDecoder - INFO -
VA ADVISORY TEST MSG. MWO TAHITI
^
SHOULD NOW ISSUE A SIGMET TEST MSG FOR VA
ADVISORY IF RECEIVED. ...KIBLER
NXT ADVISORY: NO FURTHER ADVISORIES
Expecting test or exercise or Date/Time'
The regular expression did not stop at the first occurrence of 'VA ADVISORY' but instead halted at the last one, as indicated by the caret (^) position, that occurs in the remark section of the advisory. The decoder then attempted to process the text beginning at that point.
The regular expression in question needs to be not greedy and halt at the first occurrence instead which denotes the beginning of the message.
Washington VAAC has provided a test case:
The VAA TAC decoder halts with a message
The regular expression did not stop at the first occurrence of 'VA ADVISORY' but instead halted at the last one, as indicated by the caret (^) position, that occurs in the remark section of the advisory. The decoder then attempted to process the text beginning at that point.
The regular expression in question needs to be not greedy and halt at the first occurrence instead which denotes the beginning of the message.