Weird simulator error

I've been running my game on the device for a while and all is great with that, however I recently tried to get it to work on the simulator (for screengrab purposes) and i get this error:

Code:

collect2: Id returned 1 exit status
symbol(s) not found
__wrap_sio2ObjectDuplicate in libsio2_sim.a(sio2.o)
"sio2ObjectDuplicate(SIO2Object*, SIO2transform*, char*, unsigned char*)" referenced from:

On line location 0.

I changed the sio2Object.h and .cc files - the object has 2 new settings, these being:
int pos;
int dupl;
To aid in determining which object is which. This means that my sio2ObjectDuplicate now reads:

Code:

SIO2object *sio2ObjectDuplicate( SIO2object *, SIO2transform *, char *, int, int, unsigned char );


Now this works fine on the device, but when i try to compile for the simulator I get the error mentioned above. Any ideas why it would do this?

Thanks for any help

Duplicate is not a part of 1.4 anymore...

I'm using 1.3.5 (see this thread: https://sio2interactive.forumotion.net/sio2-engine-f3/14-transform-and-linear-velocity-bug-t797.htm)