---
title: "esx.problem.iorm.badversion"
description: "Host cannot participate in Storage I/O Control (SIOC) on datastore. The version number of the SIOC agent on this host is incompatible with number of its counterparts on other hosts connected to this datastore."
canonical: "https://helpcenter.veeam.com/docs/mp/kb/esx.problem.iorm.badversion.html"
breadcrumb: "Veeam MP for VMware Online Knowledge Base > Event-Based Rules > vSphere Host Storage Warning > esx.problem.iorm.badversion"
dateModified: "2026-09-10"
---

# esx.problem.iorm.badversion

## Summary

Host cannot participate in Storage I/O Control (SIOC) on datastore.

## Causes

The version number of the SIOC agent on this host is incompatible with number of its counterparts on other hosts connected to this datastore.

## Resolutions

Review this [VMware KB article](https://kb.vmware.com/s/article/1022091) for more information.

## External

Refer to the [VMware Online Documentation](https://techdocs.broadcom.com/) for more information on vCenter event messages and possible solutions.