I was expecting as mentioned in the link you sent that this particular part of the code would work like a sniffer and decipher more information as to why it fails

Like I said in that link you use $err to get more info about which Unknown Error it is. You only look if the request fails, and only because "Unknown Error" is diagnostically useless. $! expands to "Unknown Error" for too many errors, like

(100)(Unknown error)(100)(Cannot create another system semaphore)
(101)(Unknown error)(101)(The exclusive semaphore is owned by another 
+process)
(102)(Unknown error)(102)(The semaphore is set and cannot be closed)
(103)(Unknown error)(103)(The semaphore cannot be set again)
(104)(Unknown error)(104)(Cannot request exclusive semaphores at inter
+rupt time)
(105)(Unknown error)(105)(The previous ownership of this semaphore has
+ ended)
(106)(Unknown error)(106)(Insert the diskette for drive %1)

[download]
You're also supposed to look at print $response->dump,"\n"; on error, because it might contain more than "Unknown Error"

In reply to Re^5: LWP - 500 Internal Error by Anonymous Monk
in thread LWP - 500 Internal Error by oalvi

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