---
title: "Problems with mm_form in TYPO3 4.5.0"
url: "https://www.typo3.net/d/103509-problems-with-mm-form-in-typo3-450"
source: "typo3.net"
tags: ["Extensions","Frage","Update & Upgrade"]
created: "2011-01-27"
last_reply: "2011-02-03"
replies: 5
solved: false
page: 1
pages: 1
lang: "de"
---

# Problems with mm_form in TYPO3 4.5.0

Extensions · 5 Antworten · gestartet 2011-01-27

## Eröffnungsbeitrag

**TYPO3.​UA** · 2011-01-27 · [Beitrag #1](https://www.typo3.net/d/103509-problems-with-mm-form-in-typo3-450/1)

Updated TYPO3 to version 4.5.0 and got the problem with the module mm_forum.

Click left menu on mm_forum (General settings) > Install > General > Click button Save settings

Fatal error: Call to a member function writelog() on a non-object in /home/data/www/typo3_src/t3lib/class.t3lib_tcemain.php on line 6774

same ... Click left menu on mm_forum > Install > User (User settings) > Click button Save settings

before you upgrade TYPO3 errors mm_forum was not.

Help me fix it

[Bild: \[upl-image-preview uuid=7ee3fb0c-b788-5280-a030-f323e5e485f5 url=https://www.typo3.net/assets/files/typo3net/295-error_mm_forum.jpg alt=error_mm_forum.jpg thumbnail_url=https://www.typo3.net/assets/files/typo3net/295-error_mm_forum.jpg\]](https://www.typo3.net/assets/files/typo3net/295-error_mm_forum.jpg)

## Antworten

### [#2](https://www.typo3.net/d/103509-problems-with-mm-form-in-typo3-450/2) · HollyHollmann · 2011-01-28

For fast help go to the file 'class.t3lib_tcemain.php' on line 6774 and change with

```php
//$this->BE_USER->writelog(3, 1, 0, 0, 'User %s has cleared the cache (cacheCmd=%s)', array($this->BE_USER->user['username'], $cacheCmd));
```

### [#3](https://www.typo3.net/d/103509-problems-with-mm-form-in-typo3-450/3) · TYPO3.​UA · 2011-01-28

Thank you.

Problem solved replacing the two files taken from the [Subversion repository extension](http://forge.typo3.org/projects/extension-mm_forum).

### [#4](https://www.typo3.net/d/103509-problems-with-mm-form-in-typo3-450/4) · TYPO3.​UA · 2011-01-28

**Oops, an error occured!
A cache with identifier "cache_hash" does not exist**

How to solve this problem on frontends pages?

### [#5](https://www.typo3.net/d/103509-problems-with-mm-form-in-typo3-450/5) · janc · 2011-02-02

> **HollyHollmann schrieb:**
>
> For fast help go to the file 'class.t3lib_tcemain.php' on line 6774 and change with
>
> ```php
> //$this->BE_USER->writelog(3, 1, 0, 0, 'User %s has cleared the cache (cacheCmd=%s)', array($this->BE_USER->user['username'], $cacheCmd));
> ```

Works for me with ve_guestbook (same error when submitting FE form for new entry).
Can anyone tell me what this line is about? Writing a log (where?) about user clearing cache??
Can we do without it?

### [#6](https://www.typo3.net/d/103509-problems-with-mm-form-in-typo3-450/6) · TYPO3.​UA · 2011-02-03

Hello!

Thank you.

I found another solution...

[useCachingFramework] = 1 in "Install Tool"

---

Quelle: „Problems with mm_form in TYPO3 4.5.0“, typo3.net, https://www.typo3.net/d/103509-problems-with-mm-form-in-typo3-450
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