HELP New model is showing it won't fit the build plate anymore but the dimensions are the same?

[truegtr420 0]

I have redesigned a model I am working on currently and when I made the geometry changes to the model and reloaded it back into the slicer, it now shows grey lines in the model as though it no longer fits in the build plate dimensions I have? 

I have changed none of the dimensions, just the shape and the shape doesn't extend beyond the width, height or length of the model? 

Any one have any ideas?

[truegtr420 0]

I know that timing is everything here but I need help and no one is responding here? Does anyone have a solution?

I have tried to remove my printer and then add it back in and it still won't allow me to slice even though I haven't exceeded the printers bed size with the model I am trying to slice?