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Just a guess ...

Re-order the steps, start the X server before doing your putty command.
Maybe a working X server is necessary when trying to forward X11.

Does this work for you?

awk '
/^Fatal / {
if (FatalMsg != "")
printf "%s, %s\n", FatalMsg, "No ID found"
FatalMsg = $0
sub(/\.$/, "", FatalMsg)
}
/ id = / {
if (FatalMsg == "")
...

Try this:

nawk 'BEGIN {FS=" "} {subs[$1]++} END {for (i in subs) print i, subs[i]}'

Your last version uses a field variable, $2, in a BEGIN statement.
This is not valid because when the BEGIN...