TLDR: How to ask GDB to try again searching for the source file after hitting No Source Available message without stepping?

When I do embedded debugging, I copy source files into target machine and adjust the source path accordingly. It would be really nice not having to start debugging all over again when I miss adding some file source path and hitting No Source Available message. Is there a way to ask GDB to repeat searching for the source file after the failed attempt, after I adjusted the directory paths? I cannot use reverse-step because it's not supported for multi-thread programs.