[CWB] ERROR: CQP backend startup failed

[Hardie, Andrew]

One think comes to mind: is the CQP executable on the PATH of the username that Apache runs under? If not,  then that’s the problem, and you need to add the path to the location of the executable to the CQPweb configuration file.

If that isn’t the problem then we can consider other possibilities. Before that, however: Can you check your version of CQPweb please?

note also that using the core CWB version 3.0.x with CQPweb will work, but is not recommended (since CQPweb works solely in UTF-8, and v3.0 of the core doesn’t support utf8 regular expressions). for English you wouldn’t notice much difference, for other languages you might.

best

Andrew.

From: cwb-bounces at sslmit.unibo.it [mailto:cwb-bounces at sslmit.unibo.it] On Behalf Of egobrc at gmail.com
Sent: 16 March 2015 16:53
To: cwb at sslmit.unibo.it
Subject: [CWB] ERROR: CQP backend startup failed

Hi everybody,
I have installed CQPWeb on an Apache web server. Web interface works normally: I can login and create users, but when I try to delete an user or add a group, the follwing error appears:

ERROR: CQP backend startup failed

So I searched around php code pages, and found that message in lib/cqp.inc.php : around that line I put some fwrites to print out variable values, and here is what I got:

$command: cqp -c -r /var/cqpweb/registry
$version_string before rtrim: (empty)
$version_string after rtrim: (empty)
$path_to_cqp: (empty)
$cwb_registry: /var/cqpweb/registry

It looks like that $this->process = proc_open($command, $io_settings, $this->handle); does not start cqp process? If i run cqp from command line, it starts normally and prints out:

CQP version 3.0.0

Do you have any clue? On apache logs I found this line:
PHP Notice:  Undefined variable: helplink in /srv/www/CQPweb/lib/userhome.inc.php on line 300, referer: http://SERVER_IP/cqpweb/

Thank you in advance.



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