Android Question Error on resumable sub with return value

[JDS]

We've got an resumable sub in the Starter module which sometimes returns an error
using b4a 9.8
I can't get it figured out...

the error is:

starter$ResumableSub_CheckAfterLastZendingresume (B4A line: 3550) Return 1 java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.lang.ref.WeakReference.get()' on a null object reference at anywheresoftware.b4a.keywords.Common.WaitFor(Common.java:1738) at lmmobile.jds.android.starter$ResumableSub_CheckAfterLastZending.resume(starter.java:1491) at lmmobile.jds.android.starter._checkafterlastzending(starter.java:1360) at java.lang.reflect.Method.invoke(Native Method) at anywheresoftware.b4a.BA.raiseEvent2(BA.java:196) at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:1083) at anywheresoftware.b4a.keywords.Common.CallSubNew(Common.java:1030) at lmmobile.jds.android.lm_ophalenversturen$ResumableSub_oGegevensVerzenden_Click.resume(lm_ophalenversturen.java:1946) at anywheresoftware.b4a.BA.checkAndRunWaitForEvent(BA.java:250) at anywheresoftware.b4a.BA.raiseEvent2(BA.java:190) at anywheresoftware.b4a.BA.raiseEvent(BA.java:176) at anywheresoftware.b4a.keywords.Common$14.run(Common.java:1761) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:224) at android.app.ActivityThread.main(ActivityThread.java:7520) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)




Calling code is:

Wait For(CallSub(Me,"SendAndWait")) Complete (Result As Int)

Called sub is (also in Starter module)

Sub SendAndWait As ResumableSub
    If File.Exists(Globaal.Map_JDS,Globaal.File_Berichten) Then
        PutGelezenBerichten2
    End If
        If Globaal.dolog=1 Then 
            Log("Send and wait")
        End If
    Globaal.CreateDir
    Try
        If File.ListFiles(Globaal.Map_Wachtrij).Size>0 Then
            Wait For(CallSub2(Me,"PutStatus",1)) Complete (Result As Int)
        End If
         
        If File.ListFiles(Globaal.Map_Delete).Size>0 Then
            Wait For(CallSub(Me,"PutZendingDelete")) Complete (Result1 As Int)
        End If
        If File.ListFiles(Globaal.Map_Uren).Size>0 Then
            Wait For(CallSub2(Me,"PutUren",1)) Complete (Result1 As Int)
        End If
        
        If File.ListFiles(Globaal.Map_gps).Size>0 Then
            Wait For(CallSub(Me,"PutGPS")) Complete (Result2 As Int)
        End If
        
        If File.ListFiles(Globaal.Map_Bijrijders).Size>0 Then
            Wait For(CallSub2(Me,"PutBijrijder",1)) Complete (Result3 As Int)
        End If
        
        If File.ListFiles(Globaal.Map_Activiteit).Size>0 Then
            Wait For(CallSub2(Me,"PutActiviteit",1)) Complete (Result4 As Int)
        End If
        
        If File.ListFiles(Globaal.Map_Foto).Size>0 Then
            Wait For(CallSub2(Me,"PutFoto",1)) Complete (Result5 As Int)
        End If
        
        If File.ListFiles(Globaal.Map_ChangeVal).Size>0 Then
            Wait For(CallSub2(Me,"PutChangeChauffeurKenteken",1)) Complete (Result6 As Int)
        End If
        
        If File.ListFiles(Globaal.Map_ProcesCode).Size>0 Then
            Wait For(CallSub2(Me,"PutProcescodes",1)) Complete (Result7 As Int)
        End If
        
        If File.ListFiles(Globaal.Map_VoertuigCtrl).Size>0 Then
            Wait For(CallSub(Me,"PutVoertuigControleWait")) Complete (Result8 As Int)
        End If
        
        If File.ListFiles(Globaal.Map_MainFoto).Size>0 Then
        Wait For(CallSub2(Me,"PutMainFoto",1)) Complete (Result9 As Int)
        End If
    Catch
        Log(LastException)
    End Try
    Return 1 'this triggers the error
End Sub

 

[Erel]

Wait For(CallSub(Me,"SendAndWait")) Complete (Result As Int)

Why do you use CallSub here? Just call it directly.

Are you stopping the starter service at any point?

 

[JDS]

The starter service isn't stopped.
Does it make any difference if i call of directly of with callsub? Buy i will give it a try

 

[Erel]

Only if the module gets paused. Try it without it.

 

[JDS]

Changed and (untill now) there have been no more crashes. Needs some more testing but looks good until now. Thanks Erel (as usual)!