Pfsense - Error on start

[alissonx]

Hi,

I'm using pfsense on a virtual machine (virtualbox), when I start the machine I get this error:

PHP Warning:  fopen(/tmp/config.lock): failed to open stream: Read-only file system in /etc/inc/util.inc on line 127

Warning: fopen(/tmp/config.lock): failed to open stream: Read-only file system in /etc/inc/util.inc on line 127
PHP Warning:  flock() expects parameter 1 to be resource, null given in /etc/inc/util.inc on line 138

Warning: flock() expects parameter 1 to be resource, null given in /etc/inc/util.inc on line 138
PHP Warning:  fclose() expects parameter 1 to be resource, null given in /etc/inc/util.inc on line 139

Warning: fclose() expects parameter 1 to be resource, null given in /etc/inc/util.inc on line 139

If I run this command on shell:

mount -rw /

the error desappear…

but when reboot the machine, the error happens again..

somebody have seen this error before?

thank you!