can't read "output": no such variable
    while executing
"return $output"
    (procedure "::base64::decode" line 43)
    invoked from within
"::base64::decode $context"
    (procedure "GetFilenameFromContext" line 4)
    invoked from within
"GetFilenameFromContext $context"
    (procedure "::MSNP2P::ReadData" line 184)
    invoked from within
"::MSNP2P::ReadData $p2pmessage $chatid"
    ("application/x-msnmsgrp2p" arm line 5)
    invoked from within
"switch $contentType {
			text/plain {
				::Event::fireEvent messageReceived $self $message
				$message setBody [encoding convertfrom identity [strin..."
    (procedure "::SB::Snit_methodhandleMSG" line 100)
    invoked from within
"$self handleMSG $command $message"
    ("MSG" arm line 2)
    invoked from within
"switch [lindex $command 0] {
				MSG {
					$self handleMSG $command $message
				}
				BYE -
				JOI -
				IRO {
					cmsn_update_users $self $comman..."
    (procedure "::SB::Snit_methodhandleCommand" line 24)
    invoked from within
"$options(-name) handleCommand $command $payload"
    (procedure "::Connection::Snit_methodreceivedData" line 37)
    invoked from within
"::MSN::SB1 receivedData"