Looks like Architect does not successfully change directory before running the sencha command.
And the commands seems to be run in one line, in stead of two.

To the directory is never changed. sencha is run with full path, but the PackageSettings.json is not found. The file is the correct folder, and the cmd does find the file when run manually from the correct dirctory.

Code:
C:\Program Files (x86)\SenchaArchitect>cd "E:/htdocs/ecosupport/EcoInteractive/" C:\Program Files (x86)\SenchaArchitect>sencha package build PackageSettings.json Sencha Cmd v3.0.0.250 [ERR]	 Can not open configuration file [ERR] stbuild exited with non-zero code : 3
When run manually I get the following error:
Code:
E:\htdocs\ecosupport\EcoInteractive>sencha package build PackageSettings.json
Sencha Cmd v3.0.0.250
[ERR]

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
terminate called after throwing an instance of 'std::runtime_error'
  what():  Type is not convertible to string

[ERR]           stbuild exited with non-zero code : 3

E:\htdocs\ecosupport\EcoInteractive>