extjs - Sencha Cmd failed to resolve dependency PARRENTCLASS -

i'm having problem sencha cmd tool; when try build app, error:

[dbg] adding implicit dependency ext.application call [dbg] creating virtual class definition myapp.app.application [dbg] detected application name : myapp [dbg] caching symbol declarations [dbg] linking class inheritance graph [err] failed resolve dependency parrentclass file myapp. [err] error executing page compilation unknown definition dependency : parrentclass 

does know means? parrentclass dependency , filename myapp strange, don't have file.

my app.js:

// not delete - directive required sencha cmd packages work.  //@require @packageoverrides ext.application({     name: 'myapp',     appfolder: 'app',     autocreateviewport: true,     controllers: ["breadcrumbs", "content", "lang", "login", "ping", "sidebarmenu", "topmenu"],     requires: ['myapp.singleton.context', 'myapp.singleton.storerefresh', 'myapp.singleton.utils', 'myapp.singleton.msgbox'] }); 

what causing error?