Patch Mgmt Error code documentation

I've googled and searched here but am unable to locate any good information as to what this error from Desktop Central means.

The referenced assembly is not installed on your system.

I have a handful of machines with this message on an update or two. When i check those machines, I do see the update sitting in the patches folder.

I've checked the dcpatchmgmt.log and see the entry for it there, but it's not telling me what is missing or what's being looked for.

Is there more information on this error remark so we can troubleshoot these issues better?

This is from the log.

<?xml version="1.0" encoding="UTF-8"?><agent-params><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="NAME" PARAM_VALUE="COMPUTERNAME" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="DOMAIN_NETBIOS_NAME" PARAM_VALUE="KLS" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="RESOURCE_ID" PARAM_VALUE="58838" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="COMPUTER_NAME" PARAM_VALUE="COMPUTERNAME" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="MSP_NAME" PARAM_VALUE="DC_MSP" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="CUSTOMER_NAME" PARAM_VALUE="DC_CUSTOMER" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="CUSTOMER_ID" PARAM_VALUE="1" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="RESOURCE_TYPE" PARAM_VALUE="1" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="REMARKS" PARAM_VALUE="The referenced assembly is not installed on your system. " /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="REMARKS_EN" PARAM_VALUE="The referenced assembly is not installed on your system." /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="PATCH_ID" PARAM_VALUE="26676" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="STATUS" PARAM_VALUE="7" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="ERROR_CODE" PARAM_VALUE="-1" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="COLLECTION_ID" PARAM_VALUE="60915" /><AgentParams AGENT_PARAM_ID="39" PARAM_NAME="IP_ADDRESS" PARAM_VALUE="1.1.1.11" />