Failed to determine protection level. DTS:ProtectionLevel attribute was not found.. (Path: )

[dlukyanov]

SSISBuild downloaded with nuget command

nuget install SSISBuild -ExcludeVersion

command:

ssisbuild.exe StageSSIS.dtproj -Configuration Dev1-SQL -ProtectionLevel DontSaveSensitive

results:

SSIS Build Engine
Copyright (c) 2017 Roman Tumaykin

Executing SSIS Build with the following arguments:
Project File: C:\git\BusinessIntelligenceProjects\StageSSIS\StageSSIS.dtproj
-ProtectionLevel: DontSaveSensitive
-Configuration: Dev1-SQL

Project parameters:
-------------------------------------------------------------------------------
Starting build. Loading project files from C:\git\BusinessIntelligenceProjects\StageSSIS\StageSSIS.dtproj.
ERROR: Failed to determine protection level. DTS:ProtectionLevel attribute was not found.. (Path: )

the project file does not have namespace prefix DTS:

<SSIS:Project SSIS:ProtectionLevel="EncryptSensitiveWithPassword" xmlns:SSIS="www.microsoft.com/SqlServer/SSIS">
...

[owerkop]

You're wrong. This errors is caused by bad configuration of ProtectionLevel for packages.
If You alread set in dtproj SSIS:ProtectionLevel and DTS:ProtectionLevel in all *.dtsx files perhaps there are missing some settings in dtproj.

I had to set proper value in the dtproj project file for each SSIS package:

<SSIS:Property SSIS:Name="ProtectionLevel">0</SSIS:Property>

Value of the ProtectionLevel is a number value of the DTSProtectionLevel Enum
https://docs.microsoft.com/en-us/dotnet/api/microsoft.sqlserver.dts.runtime.dtsprotectionlevel

[NowinskiK]

I have the same issue. After a few hours, I found the root cause.
I didn't have a definition of ProtectionLevel in some packages:
DTS:ProtectionLevel="0"
Unfortunately, ssis-build module is not helping here not telling what's the path of 'wrong' package.
This is a bug.
If you have plenty of them in the project - best of luck...