FastJSON question

October 26th, 2015, 03:10 PM

I have an indicator that is using a JSON call.
This works fine.

However when I edit this indicator and compile it.
Go to the chart, unload the indicator
add the recompiled indicator back to the chart

I get an exception thrown :

Unhandled exception in MyIndicator.OnBarUpdate(): Unable to cast object of type 'MyData' to type 'MyData'.

This is on the following call :
MyData = fastJSON.JSON.ToObject<List<MyData>>(response);

Exit and reStart of Ninjatrader and all works fine.
response contains the exact same JSON data

Anybody any thoughts ?

October 26th, 2015, 03:50 PM

looks there is variable called MyData and a type MyData

MyData = fastJSON.JSON.ToObject<List<MyData>>(response);

How is the variable defined ?

would try

MyData myvar = fastJSON.JSON.ToObject<List<MyData>>(response);

October 26th, 2015, 04:04 PM

Hello Michael

no not really
the variable is defined global

i just anonymized the code a bit

the problem is that the code runs fine until i edit the indicator and compile it
when i reload it , then the problem starts, i don't find a work around

the type is good, as the first time it works just fine

October 26th, 2015, 05:21 PM

Then the only thing what comes to my mind, that there is sthg left on reload.
Is there an object or a structure which needs proper termination / disposal

To my experience that can be really anything and does not necessarily have to do with this objects or lines you posted.

Wish all the best to get it working soon.

October 26th, 2015, 05:23 PM

MichaelH

Then the only thing what comes to my mind, that there is sthg left on reload.
Is there an object or a structure which needs proper termination / disposal

To my experience that can be really anything and does not necessarily have to do with this objects or lines you posted.

Wish all the best to get it working soon.

Improper disposal could cause it to not function, but I don't think it would cause it to not compile...

Mike

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FastJSON question