Loading bitmap with
ALLEGRO_BITMAP *textBox;
textBox = al_load_bitmap("textbox.png");

and it loads then after about 100 seconds it breaks saying abort() and clicking retry break in VS shows the error is thr textBox pointer is 0x0000000.. NULL

What could cause this?

You're probably leaking memory. Are you loading the same bitmap every frame without freeing it?

Appreciate your hasty replies, at the beginning of program all the bitmaps and fonts, etc are declared in class headers and defined in their constructors, never once is an allegro bitmap freed/deleted, at end of program seemigly all objects are deleted and vectors cleared.
al_load_bitmap is called each time an object of class textdisplay is created. Directory is set up correct it loads and even displays textBox then gives error sometimes when there should be no textbox displayed

You can't use an Allegro function before initializing Allegro, and if you have any global classes with constructors, or classes created before init'ing Allegro, that's a crash.

al_load_bitmap called in constructor is bad? Would it be better to load them all once in a resources class and assign the bitmap of class textdisplay to the resource bitmap?
Also how could undeallocated memory cause this, all the bitmaps are failing the way textbox did now

Your suggestion worked edgar, moved all the bitmaps initialization to a resource class and loaded them all once, then assigned the other class bitmap pointers to resources and it workes 100% appreciate the help