XAM Job Query is incorrectly returning zero results

Hello all.

My latest task in integrating XAM into our software is to achieve some form of disaster recovery tool using Job commits and queries. I have mastered the XAMQL syntax used to submit queries and overcome all my error codes, however my issue is that the results count will always be zero, even for trivially generalised queries made using wildcards which should be yielding an enormous number of items. Example code below.

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int SearchForContent()
{
    xam_status vStatus = -1;
    xam_string vXRI = "snia-xam://centera_vim!128.221.200.60?C:\\emc\\us2_profile1_rqecw.pea";
    xsystem_handle vXSystem;
    xset_handle vXSet = 0;

     const char QUERY[] = "SELECT \".xset.xuid\"";

     // Connect
    printf("Connect to: %s...\n", vXRI);
    vStatus = XAMLibrary_Connect(vXRI, &vXSystem);
    if (vStatus != 0) return vStatus;
    printf("Connected %i\n", vStatus);

     // Check valid tasks available
    xam_boolean vCap;
    vStatus = XAM_GetBoolean(vXSystem, XAM_XSYSTEM_JOB_COMMIT_SUPPORTED, &vCap);
    printf("Supports commit? %s\n", vCap ? "YES" : "NO");
    vStatus = XAM_GetBoolean(vXSystem, XAM_XSYSTEM_JOB_QUERY_CONTINUANCE_SUPPORTED, &vCap);
    printf("Supports continuance? %s\n", vCap ? "YES" : "NO");
    vStatus = XAM_GetBoolean(vXSystem, XAM_XSYSTEM_JOB_QUERY_LEVEL1_SUPPORTED, &vCap);
    printf("Supports level 1 query? %s\n", vCap ? "YES" : "NO");
    vStatus = XAM_GetBoolean(vXSystem, XAM_XSYSTEM_JOB_QUERY_LEVEL2_SUPPORTED, &vCap);
    printf("Supports level 2 query? %s\n", vCap ? "YES" : "NO");

     // Create XSet
    vStatus = XSystem_CreateXSet(vXSystem, XSET_MODE_MODIFY , &vXSet);

     // Add job command to XSet
    vStatus = XAM_CreateString(vXSet, XAM_JOB_COMMAND, true, XAM_JOB_QUERY);
    if (vStatus != 0) return vStatus;

     // Add query to XSet (stream)
    xstream_handle vQueryStream = 0;
    vStatus = XAM_CreateXStream(vXSet, XAM_JOB_QUERY_COMMAND, true, XAM_TEXT_PLAIN_MIME_TYPE, &vQueryStream);
    xam_int vWritten;
    vStatus = XStream_Write(vQueryStream, QUERY, strlen(QUERY), &vWritten);
    vStatus = XStream_Close(vQueryStream);

     // Submit the job
    vStatus = XSet_SubmitJob(vXSet);
    if (vStatus != 0) return vStatus;

     //Check the job health
    xam_string vHealth;
    vStatus = XAM_GetString(vXSet, XAM_JOB_ERRORHEALTH, &vHealth);
    printf("Query job health = %s\n", vHealth);

     xam_boolean vResultsFieldExists;
    vStatus = XAM_ContainsField(vXSet, XAM_JOB_QUERY_RESULTS_COUNT, &vResultsFieldExists);
    printf("Results field exists = %s\n", (vResultsFieldExists == 1) ? "YES" : "NO");

    xam_int vResultsCount;
    vStatus = XAM_GetInt(vXSet, XAM_JOB_QUERY_RESULTS_COUNT, &vResultsCount);
    printf("Results count = %i\n", vResultsCount);

    return vStatus;

}

This code typically yields the following output for checking the job status:

Supports commit? NO

Supports continuance? NO

Supports level 1 query? YES
Supports level 2 query? NO

(..job is then processed..)

Query job health = OK

Results field exists = YES

Results count = 0

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This feedback makes me wonder if it is not the permissions on the cluster that are the cause. However the filename for the pea file indicates querying is permitted, yet according to feedback from the cluster itself, commit is not. I'm at a loss to see how a query job can be performed without a job commit. Does anyone feel that this is the issue and have any alternative cluster suggestions, or is there something else I am missing? All documentation I have access to has drawn a blank.

Regards,

Jamie