Try to raise your PHP memory limit and report back if that helped.

We have raised the php memory limit and we get the same error.

Developers say us that:

• This works:

Object[] params = new Object[] {sessionId, surveyId, inicio, numResultados, Boolean.FALSE};
aux = (Object) client.execute("list_participants", params);
result = (Object[]) aux;

• But this doesn't work (extended attributes):

Object[] atributes = new Object[] {"attribute_1", "attribute_2", "attribute_3", "attribute_4"};
Object[] params = new Object[] {sessionId, surveyId, inicio, numResultados, Boolean.FALSE, atributes};

aux = (Object) client.execute("list_participants", params);
result = (Object[]) aux;

The error is:
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - org.apache.xmlrpc.XmlRpcException: Failed to create input stream: Server returned HTTP response code: 500 for URL: http://encuestas.d.novagaliciabanco.es/index.php/admin/remotecontrol
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.getInputStream(XmlRpcSunHttpTransport.java:60)
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - at org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:141)
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - at org.apache.xmlrpc.client.XmlRpcHttpTransport.sendRequest(XmlRpcHttpTransport.java:94)
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.sendRequest(XmlRpcSunHttpTransport.java:39)
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - at org.apache.xmlrpc.client.XmlRpcClientWorker.execute(XmlRpcClientWorker.java:53)
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:166)
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:136)
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:125)
28/04/2014 12:53:27,327 13361969 ERROR [WorkManager(4)-5] STDERR - at es.caixagalicia.ifai.batch.encuestas.servicios.impl.LimeSurveyServiceImpl.listParticipants(LimeSurveyServiceImpl.java:339)
…
28/04/2014 12:53:27,343 13361985 ERROR [WorkManager(4)-5] STDERR - Caused by:
28/04/2014 12:53:27,343 13361985 ERROR [WorkManager(4)-5] STDERR - java.io.IOException: Server returned HTTP response code: 500 for URL: http://encuestas.d.novagaliciabanco.es/index.php/admin/remotecontrol

This is working correctly in 2.00+ version.

Some idea?

Question is what the server really gives back as response. You are showing some error output by your software but not the raw server responses. Can you find that out?

This is the limesurvey server error (500) for a request with extended attributes:

10.11.34.94 - - [28/Apr/2014:12:48:10 +0200] "POST /index.php/admin/remotecontrol HTTP/1.1" 500 - "-" "Apache XML RPC 3.0 (Sun HTTP Transport)"
10.11.34.94 - - [28/Apr/2014:12:48:11 +0200] "POST /index.php/admin/remotecontrol HTTP/1.1" 500 - "-" "Apache XML RPC 3.0 (Sun HTTP Transport)"

With other parameters, without extended attributes the response is correct (200):

10.11.34.94 - - [28/Apr/2014:12:47:58 +0200] "POST /index.php/admin/remotecontrol HTTP/1.1" 200 142 "-" "Apache XML RPC 3.0 (Sun HTTP Transport)"
10.11.34.94 - - [28/Apr/2014:12:48:00 +0200] "POST /index.php/admin/remotecontrol HTTP/1.1" 200 142 "-" "Apache XML RPC 3.0 (Sun HTTP Transport)"

Should we change the code is the new version 2.05+ for extended attributes?

Thank you very much,
Rocio

An error 500 could be anything.

You will need to check your server error logs why there is an error 500. You should also try to activate debug mode in /application/config/config.php and see if you get a more detailed error on raw output.

Please report back.

Hi:
We can see this php error (in call with extended attributes):

[Fri May 02 12:52:43 2014] [error] [client 172.16.56.240] PHP Fatal error: Call to undefined method Zend_XmlRpc_Server_Fault::printXml() in /opt/limesurvey/application/controllers/admin/remotecontrol.php on line 50
[Fri May 02 12:52:43 2014] [error] [client 172.16.56.240] PHP Fatal error: Call to undefined method Zend_XmlRpc_Server_Fault::printXml() in /opt/limesurvey/application/controllers/admin/remotecontrol.php on line 50

Thank you
Rocio Grela

Thank you - but that is still too little information. Can you activate debug mode as described so we can maybe see more what's going wrong?

Sorry, we can see only this error:

PHP Fatal error: Call to undefined method Zend_XmlRpc_Server_Fault::printXml() in /opt/limesurvey/application/controllers/admin/remotecontrol.php on line 50

Hi:
We had done a change in this script
/opt/limesurvey/application/controllers/admin/remotecontrol.php

This:
$result = $this->xmlrpc->handle();
$result->printXml();
By this:
echo $this->xmlrpc->handle();

And now we get the following error in our aplication:
2014-05-15-13.03.01 ERROR - XmlRpcException list_participants encuesta 35242: org.apache.xmlrpc.XmlRpcException: Calling parameters do not match signature
2014-05-15-13.03.01 ERROR - XmlRpcException list_participants encuesta 36767: org.apache.xmlrpc.XmlRpcException: Calling parameters do not match signature

2014-05-15-13.27.36 ERROR - XmlRpcException export_responses encuesta 34371: org.apache.xmlrpc.XmlRpcException: Failed to create input stream: Server returned HTTP response code: 500 for URL: http://encuestas.d.novagaliciabanco.es/index.php/admin/remotecontrol
2014-05-15-13.27.38 ERROR - XmlRpcException export_responses encuesta 34798: org.apache.xmlrpc.XmlRpcException: Failed to create input stream: Server returned HTTP response code: 500 for URL: http://encuestas.d.novagaliciabanco.es/index.php/admin/remotecontrol

An get this errors in the log file:

172.16.56.240 - - [15/May/2014:13:27:37 +0200] "POST /index.php/admin/remotecontrol HTTP/1.1" 500 24963 "-" "Apache XML RPC 3.0 (Sun HTTP Transport)"
172.16.56.240 - - [15/May/2014:13:27:38 +0200] "POST /index.php/admin/remotecontrol HTTP/1.1" 200 228 "-" "Apache XML RPC 3.0 (Sun HTTP Transport)"
172.16.56.240 - - [15/May/2014:13:27:38 +0200] "POST /index.php/admin/remotecontrol HTTP/1.1" 500 27093 "-" "Apache XML RPC 3.0 (Sun HTTP Transport)"

The description of the function is

list_participants($sSessionKey, $iSurveyID, $iStart=0, $iLimit=10, $bUnused=false)

You are trying to add an array of attributes, which obviously does not work because it is not supported.

Have you changed the Api in the Limesurvey 2.05+? in 2.00 it was working correctly.
The official manual seems that the extended attributes are supported.
Does this functionality will be added to version 2.05 ? Otherwise we will have to remove our developments

http://manual.limesurvey.org/RemoteControl_2_API#list_participants
list_participants

Parameters:

sSessionKey (string) - Auth credentials
iSurveyID (int) - Id of the survey to list participants
iStart (int) - Start id of the token list
iLimit (int) - Number of participants to return
bUnused (bool) - If you want unused tokensm, set true
aAttributes(bool|array) An array of extended attributes that can be requested, besides the default ones (default value to false)

Fix committed to master branch: http://bugs.limesurvey.org/plugin.php?page=Source/view&id=14218

Looks like this was a fix in 2.00 that was not ported to 2.05. Will be fixed in next build.