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Author: ghogen

docs/msbuild/errors/msb3021.md

@@ -28,4 +28,4 @@ The message resembles the following, but this text is followed by additional inf
 MSB3021: Unable to copy file 'source' to 'destination'.
 ```
 
-Look to the additional information provided by the operating system to determine the cause of the problem.
+Look to the additional information provided by the operating system to determine the cause of the problem. Common causes include the file is locked by another process, insufficient permissions to write to the destination folder, insufficient space on the drive, and so on. Make sure the file is not in use, that MSBuild has write permissions on the destination folder, and that there is sufficient space on the disk.

docs/msbuild/errors/msb4067.md

@@ -28,4 +28,4 @@ The message text resembles the following text:
 The element 'element' beneath element 'parent element' is unrecognized.
 ```
 
-Check the syntax of that element and refer to the MSBuild documentation for the parent element to determine if it's a valid child element.
+Check the syntax of that element and refer to the MSBuild documentation for the parent element to determine if it's a valid child element. See [MSBuild project file schema reference](../msbuild-project-file-schema-reference.md).

docs/msbuild/errors/msb4184.md

@@ -20,7 +20,7 @@ ms.workload:
 ---
 # MSB4184
 
-This error occurs during the evaluation phase if MSBuild can't interpret an expression found in a project file or an imported file.
+This error occurs if MSBuild can't interpret an expression found in a project file or an imported file.
 
 The message resembles the following, but this text is followed by the exception text from the underlying code: