Yamcs 5.6 has removed the ByteArrayUtils.encodeShort() method. This is used by the sample command postprocessor in the quickstart project. Perhaps change to use b[i] = value >> 8 and b[i+1] = value & 0xFF. (I also found that utility convenient. It may be good to add it back.)
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[INFO] Compiling 2 source files to /Users/merose/git/quickstart/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /Users/merose/git/quickstart/src/main/java/com/example/myproject/MyCommandPostprocessor.java:[57,23] cannot find symbol
symbol: method encodeShort(int,byte[],int)
location: class org.yamcs.utils.ByteArrayUtils
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.469 s
[INFO] Finished at: 2022-03-17T11:09:18-07:00
[INFO] ------------------------------------------------------------------------
Yamcs 5.6 has removed the ByteArrayUtils.encodeShort() method. This is used by the sample command postprocessor in the quickstart project. Perhaps change to use
b[i] = value >> 8
andb[i+1] = value & 0xFF
. (I also found that utility convenient. It may be good to add it back.)