IFrame -> Dynpro -> Unlocking R/3 resources

We have developed generic step-by-step wizard with some steps screen.

Each step represent IView with IFrame to dynpro application, which is got by

WDURLGenerator.getApplicationURL( WDDeployableObject.getDeployableObjectPart(...))

These steps could not be located by using View Container as they should be flexible configured.

The problem is that: Internal Dynpro application doesn't call its wdDoExit methods, and used resources remained locked in case unexpected exit, e.g. from this portal page.

Can we forcedly close dynpro application located in IFrame?

Could somebody please help me?

Any assistance will be appreciated.