I have no idea about nab ... however

“$AMBERHOME/bin/nab lr16.nab./a.out”

Looking at your error lr16.nab./a.out:

It suggests you didn't put a space character between lr16.nab and a.out. If you run

$AMBERHOME/bin/nab lr16.nab ./a.out

I suspect it will work because at present it is looking for a file named lr16.nab./a.out which could be interpreted as a directory of lr16.nab. and a input file of a.out or the error suggests it is reading / as part of the file name. a.out of course doesn't exist its your specified output file name

Current error, "/nab: lr16.nab

I have no idea about nab ... however

“$AMBERHOME/bin/nab lr14.nab./a.out”

Looking at your error lr14.nab./a.out:

It suggests you didn't put a space character between lr16.nab and a.out. If you run

$AMBERHOME/bin/nab lr14.nab ./a.out

I suspect it will work because at present it is looking for a file named lr14.nab./a.out which could be interpreted as a directory of lr14.nab. and a input file of a.out or the error suggests it is reading / as part of the file name. a.out of course doesn't exist its your specified output file name

output of ls -l

-rw-r--r-- 1 phys 89 Oct 6 12:58 lr14.nab – Peter 5 hours ago

I have no idea about nab ... however

“$AMBERHOME/bin/nab lr16.nab./a.out”

Looking at your error lr16.nab./a.out:

It suggests you didn't put a space character between lr16.nab and a.out. If you run

$AMBERHOME/bin/nab lr16.nab ./a.out

I suspect it will work because at present it is looking for a file named lr16.nab./a.out which could be interpreted as a directory of lr16.nab. and a input file of a.out or the error suggests it is reading / as part of the file name. a.out of course doesn't exist its your specified output file name

I have no idea about nab ... however

“$AMBERHOME/bin/nab lr16.nab./a.out”

Looking at your error lr16.nab./a.out:

It suggests you didn't put a space character between lr16.nab and a.out. If you run

$AMBERHOME/bin/nab lr16.nab ./a.out

I suspect it will work because at present it is looking for a file named lr16.nab./a.out which could be interpreted as a directory of lr16.nab. and a input file of a.out or the error suggests it is reading / as part of the file name. a.out of course doesn't exist its your specified output file name

Current error, "/nab: lr16.nab