Android Question Crash upon exiting activity

Upon leaving an activity module, pressing Back button, my application crashes. Here is the relevant (?) unfiltered log entries - can anyone shed any light on what may be the problem - or how to proceed? Thanks in advance!


** Activity (dataxfer) Pause, UserClosed = true **
Duplicate finish request for ActivityRecord{427aead0 u0 b4a.gsight/.dataxfer t560 f}
ignoring event: gps1_locationchanged
sCommBuffer = #H %00000000 1560
Bad call: specified package com.google.android.googlequicksearchbox under uid 10019 but it is really 10053
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at anywheresoftware.b4a.shell.Shell.stopProgram(Shell.java:167)
at anywheresoftware.b4a.shell.Shell.handleIncomingData(Shell.java:181)
at anywheresoftware.b4a.shell.ShellConnector.readControlData(ShellConnector.java:204)
at anywheresoftware.b4a.shell.ShellConnector.connect(ShellConnector.java:185)
at anywheresoftware.b4a.shell.ShellConnector.run(ShellConnector.java:119)
at java.lang.Thread.run(Thread.java:841)

Caused by: java.lang.NullPointerException
at b4a.gsight.main.killProgram(main.java:328)
... 8 more
VM exiting with result code 0, cleanup skipped.
Process b4a.gsight (pid 26466) has died.
WIN DEATH: Window{42e09478 u0 b4a.gsight/b4a.gsight.selectrecs}