SNMP Check - doesn't working and doesn't execute any print for debug

Thanks Andreas! I finished to write the plugin with all sections needed (I hope).

from .agent_based_api.v1 import *
from pprint import pprint


def parse_damocles_in(string_table):
    section = []
    for line in string_table:
        alarm = int(line[3])
        if alarm != 0:
            section.append(line)

    return section

def discover_damocles_in(section):
    for line in section:
        yield Service(item=line[1])

def check_damocles_in(item, section):
    for id, check, state, enable, pulseCount in section:
        if check == item:
            perfdata = [("pulseCount", pulseCount, None, None, None)]
            if state == "0":
                yield Result(state=State.OK)
                yield Metric(perfdata)
            else:
                yield Result(state=State.CRIT)
                yield Metric(perfdata)


register.snmp_section(
    name = "damocles_in",
    detect = startswith(".1.3.6.1.2.1.1.1.0", "Damocles"),
    parse_function=parse_damocles_in,
    fetch = SNMPTree(
        base = '.1.3.6.1.4.1.21796.3.4.1.1',
        oids = [
            OIDEnd(),
            '3', # Sensor Name
            '2', # Sensor Value
            '4', # Sensor alarm State (ON/OFF)
            '6', # Sensor Pulse Counter
        ],
    ),
)

register.check_plugin(
    name="damocles_in",
    service_name="%s",
    discovery_function=discover_damocles_in,
    check_function=check_damocles_in,
)

Now the cmk command work as expected:

cmk --detect-plugins=damocles_in -vnII IT1-Damocles-Ingresso   
Discovering services and host labels on: IT1-Damocles-Ingresso
IT1-Damocles-Ingresso:
+ FETCHING DATA
[SNMPFetcher] Execute data source
No piggyback files for 'IT1-Damocles-Ingresso'. Skip processing.
No piggyback files for '192.168.70.17'. Skip processing.
[PiggybackFetcher] Execute data source
+ PARSE FETCHER RESULTS
Received no piggyback data
+ EXECUTING HOST LABEL DISCOVERY
+ PERFORM HOST LABEL DISCOVERY
+ EXECUTING DISCOVERY PLUGINS (1)
  7 damocles_in
SUCCESS - Found 7 services, no host labels

But without “–detect-plugins” it doesn’t:

Discovering services and host labels on: IT1-Damocles-Ingresso
IT1-Damocles-Ingresso:
+ FETCHING DATA
[SNMPFetcher] Execute data source
ERROR: SNMP error
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: .1.3.6.1.4.1.232.2.2.4.2.0


ERROR: SNMP error
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: .1.3.6.1.2.1.25.1.1.0


ERROR: SNMP error
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: .1.3.6.1.4.1.2036.2.1.1.4.0


ERROR: SNMP error
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: .1.3.6.1.4.1.6302.2.1.1.1.0


ERROR: SNMP error
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: .1.3.6.1.4.1.14848.2.1.1.1.0


ERROR: SNMP error
Error in packet
Reason: (noSuchName) There is no such variable name in this MIB.
Failed object: .1.3.6.1.4.1.30155.2.1.1.0


No piggyback files for 'IT1-Damocles-Ingresso'. Skip processing.
No piggyback files for '192.168.70.17'. Skip processing.
[PiggybackFetcher] Execute data source
+ PARSE FETCHER RESULTS
Received no piggyback data
+ EXECUTING HOST LABEL DISCOVERY
+ PERFORM HOST LABEL DISCOVERY
+ EXECUTING DISCOVERY PLUGINS (3)
  1 snmp_info
  1 uptime
SUCCESS - Found 2 services, no host labels