Help with Bug

NullReferenceException occured in:
IP 0x739b84 at offset 0x154 of method $:MoveNext () (0x739a30 0x739f04)[domain 0x1522e70 - UnityDomainLoad.exe]

Does anyone know what this means? It runs fine in the editor. But it crashes running on the iphone.

This is the only thing holding me back from finishing!!! Can anybody help?

Try running the game in the editor and watch the console for missing reference exceptions or null reference exceptions. In the editor it will tell you the line number where the exception is happening.