Error Message:"Unable to execute file for security reasons"

[seemaK]

Hello,

When i have imported the code from 8.x to 9.x & added corresponding capabilities, it's giving error "Unable to execute file for security reasons", while calling the method CContactDatabase::OpenL().

This API is used in my library phonebookimport.dll(statically linked & dynamically loaded). & this library is linked in main application say final.exe.

So i have added corresponding capability 'ReadUserData' in mmp of phonebookimport library.

Do i need to add the same capability to the main application as well?

[parag_purkar]

hi,
r u followed the below:

All DLL code runs at the capability level of the process that loads it.A process cannot load a DLL with less capability than itself.


see:http://www.symbian.com/developer/tec...chitecture.doc

Regards,
Parag Purkar

[seemaK]

Yes.. I have followed these rules, i'e , all my libraries capabilities are superset of my main applications capabilities, which loads them. So here all my DLLs have more capabilities than loading application.

In all, i have 8-9 such DLLs. Though these DLLs are not interdependant, So all of them have capabilities equal or more than main application's capabilities.

Is there anything else which i should have taken care of??

[ltomuta]

Do i need to add the same capability to the main application as well?

Yes, it is the process capability that tells the system what you are allowed to do and what not. Having the capability at DLL level only merely says that the DLL can be trusted by any process having that capability.

[seemaK]

Hey.. Thanks..
It worked after adding the same capability to the main application as well.. & so also i had to add it to all other library's mmp.

[ltomuta]

Great. Make sure to use only the minimal set or required capabilities and all will be fine.