2624786 - Powerdesigner - FlexNet Licensing error:-96,7. System Error: 11001 "Comm. error" - SAP PD

Failed to check out a license when trying to create new diagram on Portal.

*** Below is the excerpt from cmrserver.log for this error.
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license message (131281): Failed to obtain 1 license(s) for PD_SHELLW feature from license file(s) or server(s).
license message (131168): License server machine is down or not responding.
license message (0): See the system administrator about starting the license server system, or
license message (0): make sure you're referring to the right host (see LM_LICENSE_FILE).
license message (0): License feature name: PD_SHELLW
license message (0): License server host: <server>
license message (0): License search path: C:\PD\PowerDesigner Portal 16\license\powerdesigner.server.lic;
license message (0): FlexNet Licensing error:-96,7. System Error: 11001 "Comm. error"
license message (0): For further information, refer to the Sybase Software Asset Management website at http://www.sybase.com/sysam
failed to checkout the license due to SyLAPIException: Failed to checkout the license(s).
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When running "Perform Diagnostics" from the "Server Diags" tab of lmutil window, it shows the license has no problem.
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License file: D:\SYSAM\SYSAM-2_0\licenses\xxxxxxxx_served.lic
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"PD_SHELLW" v16.60000, vendor: SYBASE, expiry: 27-sep-2019
vendor_string: PKG=EAR;LT=FL
License server: xxxxxxxx
floating license starts: 1-jan-1990, expires: 27-sep-2019
Requests from the same HOST/DISPLAY/VENDOR-DEFINED* do not consume a new license
*vendor-defined is a customized grouping -- ask your software provider

This license can be checked out
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• SAP PowerDesigner (PD) 16.6 SP04 PL01
• SySAM 2.4 64bit

SAP Powerdesigner, powerdesigner, PD_SHELLW, "FlexNet Licensing error:-96,7", "System Error: 11001", portal, failed to checkout , KBA , BC-SYB-PD , PowerDesigner , Problem