executing a program (euler_et) right from the folder but says file not found

I have this executive euler_et called by another program but it says "sh: /home/software/euler2/euler_et: not found". I then tried to run euler_et directly and while I can see euler_et is right there I got error message "No such file or directory". Seems开发者_C百科 the Ubuntu system don't recognize that executive?

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Firstly make sure the file is executable:

chmod 755 ./euler_et

Then run it like this:

./euler_et

If you continue to have 'No such file or directory' error messages, there is something wrong in the filename itself, or the path to it.