Below Java Heap errors found in the BCA-Networks.log file.

PM org.apache.coyote.AbstractProtocol startAsyncTimeout
SEVERE: Error processing async timeouts
java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
    at java.base/java.util.concurrent.FutureTask.report(Unknown Source)
    at java.base/java.util.concurrent.FutureTask.get(Unknown Source)
    at org.apache.coyote.AbstractProtocol.startAsyncTimeout(AbstractProtocol.java:609)
    at org.apache.coyote.AbstractProtocol$1.run(AbstractProtocol.java:592)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.base/java.util.concurrent.FutureTask.runAndReset(Unknown Source)
    at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.OutOfMemoryError: Java heap space

Change Maximum Memory by re-running installer.

Reference-  https://docs.bmc.com/docs/networkautomation/2108/performance-tuning-1024034797.html?src=search
 

Maximum Memory Allocation: The maximum amount of memory that the
software process will use. The following table is an estimate of the setting for
initial and maximum memory based on number of devices. The actual values
depend on how your system is used; if needed, these values can be adjusted
later. If your system will manage more than 1000 devices, set the recommended
memory values specified in this table:

Number of Devices      Initial Memory             Maximum Memory
< 1000 (default)             1024 MB                        2048 MB
1000-5000                     1024 MB                      4096 MB
>5000                           1024 MB                       16,384 MB
 

*BCAN 5.2.01 for windows has a MAX of 1448MB*

***Note*** The above could be inadequate if you have Large device configurations or perform a lot of Webservice functions using the BNA API. In this case you may need to double the recommended settings

 

This value can be manually changed (Changing this way will not carry over during an  upgrade)

 

Windows:

 Run regedit

For 32 bit windows: HKEY_LOCAL_MACHINE -> SOFTWARE -> Apache Software Foundation -> Procrun 2.0 -> enatomcat -> parameters -> Java,
For 64 bit Windows: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Apache Software Foundation\Procrun 2.0\enatomcat\Parameters\Java