Error While generating HDL code using Standard and Advanced Blockset

I have tried using Standard Blockset with Advanced Blockset COmbined.

First Question is

1) Whether I need to have HDL Coder for this ?

I am referring to 3-4 section in this document https://www.altera.com.cn/content/dam/altera-www/global/zh_cn/pdfs/literature/ug/ug_dsp_design_flow.pdf

I just attached the Basic Design of what I am trying.

I just gave Input and Output connected. I used Standard and Advanced Blockset, the Simulation is running and I am getting expected Output (3.5 here).

But When I am trying to generate HDL code using this Signal Compiler, I am having below trouble.

Matlab Error :

Error using alt_dspbuilder_mdl2xml (line 63)

Java exception occurred:

com.altera.dspbuilder.common.DSPBuilderException: java.io.FileNotFoundException: D:\rtl\NewModel\NewModel_Adv_Blk___entity.xml (The system cannot find the file specified)

at com.altera.dspbuilder.simulation.templates.XMLParser.loadDocument(Unknown Source)

The error I am getting is NewModel_Adv_Blk___entity.xml file is not specified, but NewModel_Adv_Blk_entity.xml is generated.

I am not understanding why there are three underscores (___) in before entity.

Can you please help me this. Am I doing anything wrong in Procedure.