updating database blobs with otl crashes

Question

I'm writing a simple application to correct a certain byte in a binary blob that's stored in a database. I use OTL to connect my C++ program to the database. Reading the data and manipulation works fine, but when I want to write it back to the database, the program dies.

The code:

try
{
    std::string updateQuery = "UPDATE tbtptemplates "
                  "  SET tptemplate=:tp<BLOB> "
                  "WHERE afisid=:aid<INT>";

    otl_long_string blob(&stp(), theSizeOfBlob);
    blob.set_len(theSizeOfBlob);

    otl_stream str(1, updateQuery.c_str(), theDbConnection);
    str.set_lob_stream_mode(true);
    str.set_commit(0);

    otl_lob_stream lob;
    lob.set_len(theSizeOfBlob);

    str << lob;
    str << theCurrentAfisId;
    lob << blob;
    lob.close();
}
catch (const otl_exception &oe)
{
    std::cerr << oe.msg;
    throw std::runtime_error("could not write to database");
}

I spied at Sourceforge for an example.

I create an otl_long_string that takes the data. Then I create an otl_stream and bring together the SQL statement and the database connection. I use an otl_lob_stream to provide the binary data to the otl_stream. Streaming of the blob data to the otl_stream works fine. But when I hand over the id to the stream, the process dies.

This is the killer instruction:

str << theCurrentAfisId;

it is a simple int-variable that I hand over. The effect is very funny: the process doesn't die completely, only the call stack below the current method is gone. This is the call stack before the statement:

Thread #1 [fix_stp] 10307 [core: 7] (Suspended : Breakpoint)    
    Drm::TPFixer::DatabaseConnector::writeDB() at DatabaseConnector.cpp:224 0x40b565    
    Drm::TPFixer::DatabaseConnector::fixImpressiontype() at DatabaseConnector.cpp:139 0x40b516  
    Drm::TPFixer::SuperTemplateManager::fixImpressiontype() at SuperTemplateManager.cpp:67 0x4074e3 
    main() at main.cpp:51 0x40477b  

and this is the complete stack in the very moment after the instruction:

Thread #1 [fix_stp] 10307 [core: 7] (Running : Step)    
    Drm::TPFixer::DatabaseConnector::writeDB() at DatabaseConnector.cpp:240 0x40b6b2    

I tried to debug the otl. It seems that the otl finds that it's got all required parameters and starts to run. In that moment it crashes.

The environment that I use:
- OTL 4.0
- CentOS Linux, kernel 3.10.0-327.22.2.el7.x86_64
- gcc-Version 4.8.5
- Oracle 11g

Does anybody have an idea?