A LimeSurvey site page has been successfully reached, but it does not match the same LimeSurvey database.

Replaced the line. The "Undefined variable:" portion is gone and I am getting a "The LimeSurvey site page has not been reached (Error 503: server replied with an error)" prior to trying to define the correct "LimeSurvey site path"

When I define the correct site path, I still get the warning "A LimeSurvey site page has been successfully reached, but it does not match the same LimeSurvey database."

But the tested url is correct and works fine if I open in a browser.

This is what I have in drupal settings.php:
$databases = array (
'default' =>
array (
'default' =>
array (
'database' => 'customname_drup',
'username' => 'customusername',
'password' => 'randonpassword',
'host' => 'localhost',
'port' => '3306',
'driver' => 'mysql',
'prefix' => '',
),
),
);

$databases['ls']['default'] = array(
'driver' => 'mysql',
'database' => 'customname2',
'username' => 'customusername',
'password' => 'randonpassword',
'host' => 'localhost',
'prefix' => 'lime_',
'collation' => 'utf8_general_ci',
);

The username and password are the same for both databases.

I really have no clue as what the problem might be.

I will message you the urls.

Thanks for the assistance.

BTW, in node/add/survey I correctly see the polls available in the limesurvey installation.

But sync fails with a:

"Answers importation has encountered an error."
and
"An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. Path: /batch?render=overlay&id=3&op=do StatusText: Internal Server Error ResponseText:"

Thanks a lot!

Some issues I have found while testing the configuration:

a) The "Respond to the survey" link which appears once you try to resume a Survey does not work as it links to "http://node/13/edit" instead of linking to "http://mydomain.com/node/13/edit"

b) Is there a way to limit the number of times a registered user can answer a given survey? As it is it is unlimited.

I am looking for a solution that once a registered user tries to answer a survey a second time he is shown something like: "You already answered this survey. You can [link]see/edit your answers or resume the survey here[/link]." I guess some sort of block using views will do the trick.

c) In the demo site you have a form (here) where the "Submit this page in order to access to the survey form" step is supressed. How does one achieve this?

Thanks a lot for your advice.

MATTER ONE - As far as b (allowing an authenticated user to answer only once to a survey) I found the most straightforward and user friendly approach to be creating a single "landing" page for the survey using Display Suite and Views. Considering I am using Facebook for authentication the scenario of use goes like this:

a -> Anonymous users are shown a "connect with facebook button" alone (Facebook OAuth block).
b -> Once authenticated they are shown a single link to add a new node/start answering (Using a "Global: Text area" for a "No Results Behaviour" in a block created in Views).
c -> Afterwards (once they already started answering and authored a survey node) they are shown resumed info on the node/survey they own/authored, namely completion status etc... (using LS answers fields) and a link to either resume a started but unfinished survey or just to see the answers previously given. It is also possible to use a "Content: Rendered Node" field to show these directly on a block or display suite field.

I still use "Node Limit" in case the user somehow tries to add a second node/survey (say if he remember the URL from the first time).

With rules I stumbled on this issue, even following your advice. The user was redirected and the message shown but the new node was still being created even using the 'node_presave' event.

MATTER TWO - Regarding issue c (taking the user directly to start answering), I guess Drupal architecture somehow imposes an intermediate step in order to create a new node but the ideal thing would be to while still using tokens taking the user directly to LimeSurvey with a single click. The step where the user is shown the respond title for the survey/node being created/started is of no practical use and unnecessarily confusing.

Also the interface for resuming an incomplete survey with the "Edit the survey respond" thick box step might be more than the "average Joe" can handle. Personally if possible I would rather see the "Resume Answer" link take you directly to the Survey.

Perhaps by exposing/adding the "Referrer URL" (carrying the token) as a field in Views one could allow for this to be simplified/manipulated there?