Error interpretation

[ThunderSoul97]

Hi guys!

Can someone explain to me how to read a flash error? The bolded letters would be what I'm looking for.
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at text_fla::main_field_3/frame1()[text_fla.main_field_3::frame1:4

[cancerinform]

The second line after the TypeError: Error # message will tell you the more precise location of the error. If it is a function it can be anywhere within this function. Using trace at different positions will tell you.

[v5000]

The error means the stage has an instance of the class "main_field" and its timeline is throwing an error in frame 1 at line 4.

The "_3" is probably flash auto-naming the instance and probably just signifies that it is the third time a "main_field" has been created. If you have something in the library named main_field open it and look at frame 1 line 4.