@ricardoftribeiro looks like you have installed the version from the exchange (v1.1.)
With version 1.4 of the squid package the output from the find comand looks like this:
~/local/share/check_mk$ find ./ -name *squid*
./web/plugins/wato/check_squid.py
./checks/check_squid.cpu
./checks/check_squid.include
./checks/check_squid.server_reqs
./checks/check_squid.client_reqs
./checks/check_squid.client_hits
./checks/check_squid.dns_time
./agents/plugins/linux/squid
./agents/bakery/squid
./checkman/check_squid
So there is no check_squid
file in the package, also if you have a look at the github repository this file is missing.
The second thing i noted after installing squid_1.4.mkp, thre is an error in the wato file.
Loading "/omd/sites/build/local/share/check_mk/web/plugins/wato/check_squid.py" failed: __init__() got an unexpected keyword argument 'allow_empty'
You can fix this by removing the ‘allow_empty=False,’ from the wato file.
@DirkLaurenz For know you can try your luck with the version from the exchange or contact the author of the package to fix this.
cheers
Thomas