java.lang.NullPointerException: This exception has no message.

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Samebug tips

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Expert tip

Check if you imported android.support.v4.app.FragmentManager and not android.app.FragmentManager. Check for naming problems in your xml files as well, might have inconsistencies!

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Expert tip

Also, check if you're not using android.support.v4.app.FragmentTransaction with android.app.Fragment, as they're not totally compatible.

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java.lang.NullPointerException:
at android.support.v4.app.BackStackRecord.doAddOp(BackStackRecord.java:414)
at android.support.v4.app.BackStackRecord.replace(BackStackRecord.java:449)

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