After upgrading to Symantec Protection Engine (SPE) 9.3 you observe a number of "Ignore Scan Error" entries with the SSE########.log file. Despite these entries, your ICAP/RestAPI/RPC client is not reporting any scan errors.
SPE 9.3 or newer
SPE 9.3 includes a new feature called "IgnoreScanErrors." This feature prevents SPE from returning an error message to the client if an internal scan error is detected. This feature is enabled by default.
No action is required as this behavior is by design and is expected in SPE versions 9.3.
category3.xml attached to this KB<IgnoreScanErrors enabled="true">
<IgnoreScanErrors enabled="false">
category3.xml in the <SPE_INSTALL_FOLDER>
C:\Program Files\Symantec\Scan Engine/opt/SYMCScan/binnet stop symcscan
net start symcscan
/etc/init.d/symcscan restart
category3.xml attached to this KB<item value="-1"/> to between the <items></items> tags of the scan error you wish to see (the example below will cause SPE to return Decomposer errors when they are encountered):...
<DecomposerScanner>
<items>
<item value="-1"/>
</items>
</DecomposerScanner>
...
category3.xml in the <SPE_INSTALL_FOLDER>
C:\Program Files\Symantec\Scan Engine/opt/SYMCScan/binnet stop symcscan
net start symcscan
/etc/init.d/symcscan restart