---
title: Message Version is Missing
description: "**ERROR MESSAGES** ***Project Management Cell is unavailable*** ***Project Management Cell is unavailable for login*** # Possible Problems and Solutions: The following table is designed to assist you with troubleshooting this error. | When The Error Message Was Received | Possible…"
url: "https://i2b2.org/docs/message-version-is-missing/"
updated: "2026-09-15"
category: i2b2 Installation Guide / Chapter 7. Troubleshooting Installation Errors
---

# Message Version is Missing

**ERROR MESSAGES**

***Project Management Cell is unavailable***

***Project Management Cell is unavailable for login***

# Possible Problems and Solutions:

The following table is designed to assist you with troubleshooting this error.

| When The Error Message Was Received | Possible Problem(s) | Possible Solution(s) |
| --- | --- | --- |
| Received when attempting to log into the i2b2 Workbench | The messageversion property in the i2b2Workbench.properties file may be missing or not defined correctly. | Revisit the ***i2b2Workbench.properties*** file and verify the following: - A property called messageversion is listed. - The property name is spelled correctly (no spaces in the name). - A value for this property has been entered and is correct. |

# Installation Guide Resources:

The following resources address configuring the i2b2Workbench.properties file and how to access it on either a Macintosh or Windows machine.

| Resource For... | Chapter | Section |
| --- | --- | --- |
| Configuring the PM Cell in the i2b2Workbench.properties file | [i2b2 Workbench Install](https://i2b2.org/docs/3-i2b2-workbench-install-optional/) | [Define Hive Location](https://i2b2.org/docs/3-3-1-define-hive-location/) |
| Accessing the i2b2Workbench.properties file on a Mac | [i2b2 Workbench Install](https://i2b2.org/docs/3-i2b2-workbench-install-optional/) | [Access Properties File on a Macintosh](https://i2b2.org/docs/8-3-1-1-access-properties-file-on-a-macintosh/) |
| Accessing the i2b2Workbench.properties file on Windows | [i2b2 Workbench Install](https://i2b2.org/docs/3-i2b2-workbench-install-optional/) | [Access Properties File on Windows](https://i2b2.org/docs/8-3-1-2-access-properties-file-on-windows/) |