Hello!

Item Type - Zabbix trapper
Type of information - Numeric (unsigned)

XML XPath parameter: /document/item/value
Sender command: zabbix_sender -z 127.0.0.1 -s "Zabbix server" -k item.preprocessing -o '<document><item><value>10</value></item></document>'
Result per log: error reason for "Zabbix server:item.preprocessing" changed: Value "<value>10</value>" of type "string" is not suitable for value type "Numeric (unsigned)"
Expected result: receive a value of 10

XML XPath parameter: /document/item
Sender command: zabbix_sender -z 127.0.0.1 -s "Zabbix server" -k item.preprocessing -o '<document><item>10</item></document>'
Result per log: error reason for "Zabbix server:item.preprocessing" changed: Value "" of type "string" is not suitable for value type "Numeric (unsigned)"
Expected result: receive a value of 10

XML XPath parameter: /document
Sender command: zabbix_sender -z 127.0.0.1 -s "Zabbix server" -k item.preprocessing -o '<document>10</document>'
Result per log: error reason for "Zabbix server:item.preprocessing" changed: Value "<document>10</document>" of type "string" is not suitable for value type "Numeric (unsigned)"
Expected result: receive a value of 10

XML XPath parameter:

/document/item[1]/value

Sender command: zabbix_sender -z 127.0.0.1 -s "Zabbix server" -k item.preprocessing -o '<document><item><value>10</value></item></document>'
Result per log: error reason for "Zabbix server:item.preprocessing" changed: Value "<value>10</value>" of type "string" is not suitable for value type "Numeric (unsigned)"
Expected result: receive a value of 10

Zabbix built with libxml support:

# ldd /usr/local/sbin/zabbix_server | grep xml
libxml2.so.2 => /lib64/libxml2.so.2 (0x00007fc742933000)
# rpm -qi libxml2 | grep Version | head -1 | cut -f2- -d':';
2.9.1

Regards,
Oleg