Could not find executable running image_view from rosrun
I've been using image_view to see the contents of image topics for some time, but I encountered a problem and I have no idea what the cause is. Here's what I get when trying to check an image topic:
Command I typed:
rosrun image_view image_view image:=/...(topic)
Terminal output:
[rosrun] Couldn't find executable named image_view below /opt/ros/hydro/share/image_view
[rosrun] Found the following, but they're either not files, or not executable:
[rosrun] /opt/ros/hydro/share/image_view
It shouldn't be a source problem. Many other programs can run normaly.
I would really appreciate your help. Thanks!