Only parse for a model if the file stream is good.
Only parse for a model if the file stream is good.

cellml/libcellml,MichaelClerx/libcellml,cellml/libcellml,hsorby/libcellml,MichaelClerx/libcellml,hsorby/libcellml,hsorby/libcellml,nickerso/libcellml,hsorby/libcellml,cellml/libcellml,nickerso/libcellml,cellml/libcellml,MichaelClerx/libcellml,nickerso/libcellml,nickerso/libcellml