Within the component spec I have:

<Property name='frequencies' type='long' writable='true' sequenceLength='50'/>

When I run ocpidev build from within the .test folder I get the following (I have replaced the name of the component with <component_name>):

Spec is "local.uhd.uhd.<component_name>" in file "../lib/<component_name>-comp.xml"
Looking for workers with the same spec: "local.uhd.uhd.<component_name>"
Found worker for this spec:  <component_name>.rcc
Writing cases/subcases report in "gen/cases.txt"
ocpigen: ../gen/runtime/base/src/BaseValue.cc:153: OCPI::Base::Value& OCPI::Base::Value::operator=(const OCPI::Base::Value&): Assertion `!v.m_parent' failed.
make: *** [/home/dwp/git/opencpi/cdk/include/test.mk:94: gen/cases.xml] Aborted (core dumped)

For comparison, I have another component that I have a working unit test for that does not include any sequence properties, the test XML looks like this:

<Tests UseHDLFileIo='true'>
<Output port='out' script='verify.py'/>
<Property name='sampleRate' values='10, 20'></Property>
<Property name='duration' values='0.25, 1.0'></Property>
<Property name='frequency' values='1, 2'></Property>
<Property name='amplitude' values='100, 1000'></Property>
</Tests>

When I run ocpidev build from within that component’s .test folder I get this output:

Spec is "local.uhd.uhd.<component_name>" in file "../lib/<component_name>-comp.xml"
Looking for workers with the same spec: "local.uhd.uhd.<component_name>"
Found worker for this spec:  <component_name>.rcc
Writing cases/subcases report in "gen/cases.txt"
Generating required HDL assemblies in gen/assemblies
Generating required input and property value files in gen/inputs/ and gen/properties/
Generating required application xml files in gen/applications/
Generating summary gen/cases.xml file