Solutions

Why DataWriter::write() execution time can grow with local multicast subscribers

Summary On Linux/Windows and potentially other operating systems, when a DataWriter sends data samples to a multicast address, the performance of the underlying UDP sendmsg() call varies depending on whether multicast DataReaders are located on the same local host. If there are no local, multicast ...
grayson
Fri, 08/01/2025 - 15:51
228 reads — 0 comments

XTypes compliance mismatch

By default, Connext data serialization is not fully compliant with Extended CDR encoding. While this doesn't affect correctness it may prevent interoperability with other vendors. To make Connext compatible with the OMG 'Extensible and Dynamic Topic Types for DDS' specification, version 1.3 , you ...
arobles
Thu, 06/12/2025 - 07:43
397 reads — 0 comments

Error using RTI Connext Professional free or Express license with older versions of Connext

In some cases, you may receive the wrong version of an RTI Connext Professional free trial or Connext Express license. If you do, you will receive the following error: RTI Connext DDS feature license not found: RTI_LICENSE_FILE = /home/my_user/rti_license57814.dat. Please contact support@rti.com ...
rrodriguez
Wed, 05/21/2025 - 03:23
549 reads — 0 comments

How do I restrict and prioritize interfaces for RTI Connext to use?

(This article expands on the community post: How do I restrict RTI Connext to use only a subset of interfaces? ) On a machine with multiple NICs, users can restrict RTI Connext® traffic to a subset of the available network interfaces (NICs). RTI’s Connext DDS 7.3 introduced the capability to ...
mmohr
Tue, 12/17/2024 - 10:00
2035 reads — 0 comments

Why do I see the WARNING message “PRESCstReaderCollator_getKey:instance not found”?

When processing a metadata sample that indicates the instance transition change to NOT_ALIVE_NO_WRITERS or NOT_ALIVE_DISPOSED, you may see the following WARNING messages when calling the get_key_value API: WARNING PRESCstReaderCollator_getKey:instance not found WARNING PRESPsReader_getKey:!collator ...
afernandez
Tue, 12/17/2024 - 07:10
777 reads — 0 comments

Why do I get an OSSL_STORE API error and crash when creating a secure participant on Linux?

On Linux systems, if you are creating a DomainParticipant with Security Plugins enabled, and your application is linked to both TensorFlow and OpenSSL , you may see errors like this: RTI_Security_Util_uriToStringOssl:OpenSSL function PEM_write_bio_X509 failed with error: error:0c00009b:ASN.1 ...
grayson
Tue, 11/12/2024 - 10:05
1042 reads — 0 comments

License error when using Real-Time WAN Transport

When using the Real-Time WAN Transport, you may see a license error that looks like this: RTI Real-Time WAN Transport feature license not found: NDDSHOME = C:\Program Files\rti_connext_dds-7.3.0/rti_license.dat. Please contact support@rti.com with any questions or comments. ERROR [0x01012400, ...
grayson
Mon, 10/14/2024 - 08:20
1308 reads — 0 comments

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