Are you sure is it an error?
In ECC EhP 3 it is a warning.

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Hi Ivan,

Sorry, it was a warning, but still I was not able to activate the objects.

I tried to follow the order as per installation guide

Activate all domains -- Done

Activate class ZCL_EXCEL_WORKSHEET_COLUMNDIME and ZCL_EXCEL_WORKSHEET_ROWDIMENSI

-- I could activate ZCL_EXCEL_WORKSHEET_ROWDIMENSI but not ZCL_EXCEL_WORKSHEET_COLUMNDIME as it is using a method zcl_excel_common=>convert_column2int

and zcl_excel_common is not active, I tried to activate this class and this class is dependent on ZEXCEL_T_FIELDCATALOG

Further I tried to activate all the objects at a time using "whole worklist" button, but still could not activate.

Regards,
Ravi

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Maybe I have not clearly described the activation procedure, I have updated InstallationGuide on wiki; I'll report below the steps:

Activate all domains
Activate all DDICs object except: ZEXCEL_S_WORKSHEET_COLUMNDIME, ZEXCEL_S_WORKSHEET_ROWDIMENSIO, ZEXCEL_T_WORKSHEET_COLUMNDIME, ZEXCEL_T_WORKSHEET_ROWDIMENSIO.
Activate class ZCL_EXCEL_WORKSHEET_COLUMNDIME and ZCL_EXCEL_WORKSHEET_ROWDIMENSI
Activate: ZEXCEL_S_WORKSHEET_COLUMNDIME, ZEXCEL_S_WORKSHEET_ROWDIMENSIO, ZEXCEL_T_WORKSHEET_COLUMNDIME, ZEXCEL_T_WORKSHEET_ROWDIMENSIO.
Activate all classes
Activate demo reports

Let me know
Ivan

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Hi Ivan,

Still I could not activate ZCL_EXCEL_WORKSHEET_COLUMNDIME

I feel problem lies with inter dependancy of class-ZCL_EXCEL_STYLE_CONDITIONAL and class-ZCL_EXCEL_COMMON and structure-ZEXCEL_S_FIELDCATALOG

Regards,
Ravi

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Try to activate anyway and when you have activate all other objects, make a new activation.

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I tried a new nugg import on a new system here the detailed steps I follow

Activate all domains

Activate all data elements

Activate all Database Tables / Structures except

  ZEXCEL_S_FIELDCATALOG
  ZEXCEL_S_WORKSHEET_COLUMNDIME
  ZEXCEL_S_WORKSHEET_ROWDIMENSIO

Activate all Table Types except

  ZEXCEL_T_FIELDCATALOG Table binding field catalog 
  ZEXCEL_T_WORKSHEET_COLUMNDIME Collection of column dimensions 
  ZEXCEL_T_WORKSHEET_ROWDIMENSIO Collection of row dimensions 

Activate all interface/classes (activate anyway)

Activate remaining Database Tables / Structures (if any error occurs open the structure and double click on the class object, SAP need to refresh its buffer)

  ZEXCEL_S_FIELDCATALOG
  ZEXCEL_S_WORKSHEET_COLUMNDIME
  ZEXCEL_S_WORKSHEET_ROWDIMENSIO

Activate remaining Table Types (if any error occurs open the structure and double click on the class object, SAP need to refresh it's buffer)

  ZEXCEL_T_FIELDCATALOG
  ZEXCEL_T_WORKSHEET_COLUMNDIME
  ZEXCEL_T_WORKSHEET_ROWDIMENSIO 

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