Vashishta potential

Dear Doctor
I use potential vashishta. But when i run program error appear: cannot open vashishta potential file AlN.vashishta: No such file or directory (src/potential_file_reader.cpp:59)
*Last command: pair_coeff * * AlN.vashishta Al N *
Best and Regard

The message simply means that LAMMPS can’t locate the AlN.vashishta file. Is it in the same folder as your input?