useless error message when ns fails to parse

[mikeryan]

users ~ $ fedd_ns2topdl.py --url http://localhost:23235/ --file=line.ns 
Error: Connection Error (8)
Description: Too many failures: 

From /var/log/fedd.log:

01 Nov 10 13:59:34 fedd [fedd] Error on incoming connection: <M2Crypto.SSL.Connection.Connection instance at 0x29729bec> ('127.0.0.1', 57542)
wrong # args: should be "ns self class proc n1 n2 bw delay type args"
    (Simulator duplex-link line 49)
    invoked from within
"$ns duplex-link $left $middle 100mb 0ms"
    invoked from within
"set link0 [$ns duplex-link $left $middle 100mb 0ms]"
    (file "/tmp/ns2topdl-Zynywq/experiment.tcl" line 8)
    invoked from within
"real_source ${GLOBALS::nsfile}"
    invoked from within
"if { ${GLOBALS::errors} != 1 } {
    file copy -force ${GLOBALS::tbcompat} .
    real_source ${GLOBALS::nsfile}

    if {${GLOBALS::ran} == 0} {
        perr..."
    (file "/usr/testbed/lib/ns2ir/parse.tcl" line 694)
01 Nov 10 13:59:34 fedd [fedd] Error on incoming connection: <M2Crypto.SSL.Connection.Connection instance at 0x2977fe4c> ('127.0.0.1', 52443)

will attach bad NS file