Hello,
you need to specify the source position type
tmp->writeByte(POSITION_2D)
before sending x and y

regards,
Jakob

From: Wasim Ahmed <[email protected]>
> To: "[email protected]" <[email protected]>
> Cc:
> Date: Tue, 6 Dec 2016 12:52:27 +0000 (UTC)
> Subject: Fw: SUMO-TRACI-QUERY [Converting XY Coordinates to Lat/Long]
>
>
>
> Hello,
>
>
>
> I wanted to convert the retrieved XY coordinates to Latitude and Longitude.
>
>
>
> I saw the command to do so is 0x82 and 0x58 in documentation  [
> http://www.sumo.dlr.de/wiki/TraCI/Simulation_Value_
> Retrieval#Command_0x82:_Position_Conversion].
>
>
>
> I have valid XY Coordinates in pos.x and pos.y.
>
> So in order to convert my XY Coordinates to Lat/Long .  I am using
> following command. Don’t know what’s wrong with it:
>
>
>
> *tcpip*::Storage* *tmp* = new *tcpip*::Storage;
>
>
>
> *tmp*->writeByte(TYPE_COMPOUND);
>
> *tmp*->writeInt(2);
>
>
>
> *tmp*->writeDouble(pos.x);
>
> *tmp*->writeDouble(pos.y);
>
> *tmp*->writeByte(TYPE_UBYTE);
>
>
>
> *tmp*->writeUnsignedByte(POSITION_LON_LAT);
>
>
>
> send_commandGetVariable(0x82,0x58,“veh1”,*tmp*);
>
>
>
> I debugged the code and error is coming in 
> “send_commandGetVariable(0x82,0x58,“veh1”,tmp);”
> function.
>
> Getting following error on SUMO-GUI Server:
>
>
>
> Error: tcpip::Storage::readIsSafe: want to read 823066624 bytes from
> Storage, but only 20 remaining
>
> Quitting (on error).
>
>
>
>
>
> Any Help!!
>
>
>
> ThanksJ
>
>
>
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