"QEventLoop::exec: instance 0xbfd551e4 has already called exec()" Problem

[umtkyck]

I have three class , json package parser, serialport controller and tcp sender.While I was sending serial package suddenly json package comes and parsed but in serial sender side gives this error:

"QEventLoop::exec: instance 0xbfd551e4 has already called exec()"

and code crashes.How can I solve this problem?
Output is like that:

@

"7E 7E 12 01 02 10 10 50 AA AA "
"http://1.11.31.10:28017/iybs_status/timetable/?filte_stationid=999"
RFID Init Stater

"02 00 08 00 52 00 B9 05 " --> Serial Packet
// ---json parsing ---
Reply = "{
"offset" : 0,
"rows": [
{/JSON/ } }
],

"total_rows" : 1 ,
"query" : {} ,
"millis" : 0
}
"
JSON Parsed
// --- JSON Finished ---
Event loop calisiomus--> RFIDCSFourLineStater

"7E 7E 12 01 02 10 10 50 AA AA " --> An other serial packet
QEventLoop::exec: instance 0xbfd551e4 has already called exec()
"7E 7E 12 01 02 04 00 68 AA AA "
QEventLoop::exec: instance 0xbfd551e4 has already called exec()

@

[SGaist]

Hi,

Without seeing any part of your code, it's crystal ball debugging. Please show us the related classes