---
title: "esx.problem.migrate.vmotion.default.heap.create.failed"
description: "Default migration heap creation failed. The host is under a severe host memory pressure or the virtual address space is exhausted. Make sure that sufficient memory resources are available for migration."
canonical: "https://helpcenter.veeam.com/docs/mp/kb/esx.problem.migrate.vmotion.default.heap.create.failed.html"
breadcrumb: "Veeam MP for VMware Online Knowledge Base > Event-Based Rules > vSphere Cluster Error > esx.problem.migrate.vmotion.default.heap.create.failed"
dateModified: "2026-09-10"
---

# esx.problem.migrate.vmotion.default.heap.create.failed

## Summary

Default migration heap creation failed.

## Causes

The host is under a severe host memory pressure or the virtual address space is exhausted.

## Resolutions

Make sure that sufficient memory resources are available for migration.

## External

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