grads: /opt/local/bin/wgrib already exists and does not belong to a registered port

[kimi4896171@…]

epri12i1:~ epri$ grads
-bash: grads: command not found
epri12i1:~ epri$ sudo port install grads
--->  Computing dependencies for grads
--->  Activating grads @2.0.2_7
Error: org.macports.activate for port grads returned: Image error: /opt/local/bin/wgrib already exists and does not belong to a registered port.  Unable to activate port grads. Use 'port -f activate grads' to force the activation.
Please see the log file for port grads for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_grads/grads/main.log
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
Error: Processing of port grads failed
epri12i1:~ epri$ sudo port -f activate grads
--->  The following versions of grads are currently installed:
--->      grads @2.0.2_6
--->      grads @2.0.2_7
Error: port activate failed: Registry error: Please specify the full version as recorded in the port registry.
epri12i1:~ epri$ 

there's no grads program so i installed it and it failed :( i tried logout and rebooting whole program but it failed again :(( self upgraded of course but it failed again :((( what should i do? is there any problem that i miss?

i realllllllllyyyyyyyy want your help!

[ryandesign (Ryan Carsten Schmidt)]

In order to force the activation, you would need to specify which of the two versions you have installed you want to activate, for example:

sudo port -f activate grads @2.0.2_7

But the real question is why does /opt/local/bin/wgrib already exist and not belong to a registered port? That should not be. If you cannot explain why these files already exist, who knows how many other files are in your MacPorts prefix that should not be there. Because of this, you may run into this or other problems again later with other ports. It may be safer to uninstall all ports, and uninstall MacPorts and delete all of /opt/local, after saving any important data therein, and then reinstalling MacPorts and the ports you want. Then you can be sure the only files that are there are the ones MacPorts put there.