Failed to find file for @core

[Dmoney]

Im trying to compile my application but I'm getting this error:

[ERR]		Failed to find file for @core
 required by /Applications/MAMP/htdocs/top250/daily/ext/src/chart/series/Series.js
[ERR]		Error executing page compilation Failed to find any files for @core
[ERR]		com.sencha.exceptions.ExBuild: Failed to find any files for @core

Any Idea what this means?

I'm using Sencha Cmd v3.0.2.288 and extjs-4.1.1c

[Dmoney]

update* think I was using an incompatible sdk. still getting errors but unrelated to the one mentioned above.

[Izhaki]

Any chance you elaborate on "incompatible sdk" (and what has solved it).

I'm using 4.1.1a and with either v3.0.0.250 or v3.0.2.288 I get:

[ERR]        Failed to find file for @core
 required by /Library/WebServer/Documents/v4/submission/../ext-4.1.1a/src/direct/Provider.js
[ERR]        Error executing page compilation Failed to find any files for @core
[ERR]        com.sencha.exceptions.ExBuild: Failed to find any files for @core

[Dmoney]

for me I was using 4.1.1c and I went back to 4.1.1 and I stopped getting the error