Fixed duration / unit activities– Duration Changes

filter for all activities 

add a column for duration type 

change the first on to fixed duration/Units per time

fill down for all of the duration types

go to projects directory 

make sure that your project is open and highlighted 

go to the default tab

under duaraiton type select 

fixed duration/Units per time

also check your activity type and make sure that it is task dependent NOT resource dependent 

Zoltan,

Thanks for your reply, what you said is absolutely right that will work.

But my problem is that i have to use fixed duration / units (not fixed duration / units per time).

I have fixed the problem by re importing the OD. however for me it seems like a bug... but not sure. earlier this (OD) wasn't getting changed when i add resoruces with this type of activities.

If anyone else got different opionion please share.

ok then here is why this is happening 

Does the resource have 0 set for Default Units per Time ?

AND

Does the setting in the Projects View look under the Resource Tab is Drive activity dates by default selected ? 

if so then this is the culprit

to fix this 

Go to the Projects directory check the Resource Tab and uncheck Drive activity dates by default

and 

go to the resource directory and select your resource and set the Default Units per Time in the Resource Dictionary under the Details Tab to something other than 0.

because anything divided by zero is  ? 0