Smart object integrated Infopath forms in browser - udcx files

I have created an infopath form and have added a number of smart objects as secondary data sources to this form. When I publish this form to a forms library and try to open it in a browser, I get some non specific errors. I found out that data connections in browser forms are only supported if the data connections are in udcx files. I therefore converted all data connections (for smart objects) in the form to udcx files by using the covert button in infopath and redeployed the forms. That fixed the errror and i am able to open the form in browser and data is retreived via smart objects. However, when I use this form in a K2 process, it gives me an error- parameter not specified - URL. I am able to open the form in client but it errors out if I try opening in a browser. I am curious if anyone has created a infopath based K2 process which uses a smart object (or any secondary data source) and opens in a browser. It seems from Infopath documentation that this is only possible via udcx files but i couldn't find any reference to udcx files in K2 documentation and it doesn't seem to work either.