ASlink-Error - OSEG

you ( the compiler ) has finished internal ram for variable storage

you can recover some bytes in these ways :

aliasing some variables between functions shrink data buffers to minimum if possibile use qualified pointers instead of generic pointers move some variables in indirect ram ( idata keyword ) expecially data buffers that are accessed trough pointers move to some variable in external ram ( xdata keyword ) ditto

in the last two cases you have to inform the compiler ( the linker ) where these variables resides and eventually where the stack is ( past the end of indirect variables ) read carefully the docs from the compiler to understand how this can (must ) be done