string too long

As a quick sanity check, can you create a default HelloWorld Example using the contents of your IDL file? This experiment will help determine how to proceed.

HelloWorld.idl:
struct datamsg {
string<8> ID;
string<128> file_name;
string<65536> data;
long timestamp;
};

Generate the example framework:
"%NDDSHOME%"\bin\rtiddsgen -language C++ -example x64Win64VS2017 HelloWorld.idl (Windows)

If you run the resultant publisher and subscriber, with the created USER_QOS_PROFILES.xml Qos File, do you get the string too long message?

Pasting in the exact message helps.

Are you on a Windows, Mac or Linux target?

I assume you ran the  rtiddsgen as I mentioned earlier?  (i.e. no additional flags, etc.)

Instead of 65,536,  if you drop the string size to something like 50,000 do you still get that error?    

The reason I ask is because I am trying to determine if it is a transport size limit we need to experiment with or one of the default DDS QoS we need to increase.

This article may help.

https://community.rti.com/forum-topic/long-string-length

Addition:    What version of DDS are you using 5.3.1,  6.0.1, etc?     

Since I have Windows 10 and 6.0.1,   I will review my steps:

1.) Setup NDDSHOME, etc.   (console #1)

call "C:\Program Files (x86)\Microsoft Visual Studio\2017\WDExpress\VC\Auxiliary\Build\vcvars32.bat"
call "C:\rti_connext_dds-6.0.1\resource\scripts\rtisetenv_x64Win64VS2017.bat"

2.) Create HelloWorld.idl

I start with a completely empty directory with the exception of a HelloWorld.idl file containing:

struct datamsg {

string<8> ID;
string<128> file_name;
string<65536> data;
long timestamp;
};

3.)  Generate the example    (console #1)

"%NDDSHOME%"\bin\rtiddsgen -language C++ -example x64Win64VS2017 HelloWorld.idl

4.) Compile with  VS2017  (console #2)

call "C:\Program Files (x86)\Microsoft Visual Studio\2017\WDExpress\VC\Auxiliary\Build\vcvars32.bat"
call "C:\rti_connext_dds-6.0.1\resource\scripts\rtisetenv_x64Win64VS2017.bat"
call "C:\Program Files (x86)\Microsoft Visual Studio\2017\WDExpress\Common7\IDE\wdexpress.exe"

Retarget the SLN file with VS2017 and compile.

5.) Create a publisher in console #1:

call "C:\rti_connext_dds-6.0.1\resource\scripts\rtisetenv_x64Win64VS2017.bat"

.\objs\x64Win64VS2017\HelloWorld_publisher.exe

6.) Create a subscriber in console #3:

call "C:\rti_connext_dds-6.0.1\resource\scripts\rtisetenv_x64Win64VS2017.bat"

.\objs\x64Win64VS2017\HelloWorld_subscriber.exe

What are you doing differently?

There are some QoS settings that we can experiment with but I'm wondering why it works for me and not for you given that we seem to have

identical setups.

Hi Karen,

I think I have confused the issue by thinking that this is a DDS QoS issue where the string you were publishing was too large to be sent over RTPS.

This may not be the case -- this might be a simple case of the string is too large to print to the screen.

I assume your message with  "Yeeeeeeeeeeeeeeeeeeeeee"  in it was you setting the string to a value?   

As an experiment,  leave the string size large in the IDL file but initialize the string to something small in your publisher --      e.g.    "This is a test".   

Do you still get the error message?

No Problem ....  I learned a lot on this issue so will be adding this to my notes.