Destroying the instance of a gameObject on Android vs in Editor

When I test this line using the editor and Unity Remote for Android, it works... but this seems to cause the rest of the function to halt when exported as apk and running on device.

Destroy (selectedObj.gameObject);

selectedObj is a global variable that receives new instantiations. Each time it receives a new instantiation, I have the Destroy line to prevent having multiple instances..

How do you destroy and manage object usages of this kind?