We don't kown which binary version of Singular you are using
and on what kind of machine you are working.
But as you write, that you entered that
./Singular,
I suppose that you have a Unix/Linux system.
So entering
./Singular supposes that
you are at this moment in the directory where
the Singular-binary is located. Is this the case?
Type
ls -l If you see the Singualar file there, then check whether
it is executeable. This means that the
x flags are set.
If not, then enter
chmod a+x Singular and
enter
./Singular again.
Note, usually it should be enough just to call
Singular from everywhere, provided you have set properly the variables
$PATH$ (and $SINGULARPATH)$ ( for instance in .bash_login)
Consult for PATH
http://www.singular.uni-kl.de/UNIX/generic_install.html and for SINGULARPATH
http://www.singular.uni-kl.de/Manual/la ... .htm#SEC86 Hope that helps
C. Gorzel