Mapping functions are not available

Hi,

is there any mapping functions like ifS and ifSWithoutElse. and in which service pack these functions came.

As we have done mapping using these functions in development and same functions are not available in production system, when we have transported this mapping into production only for those fields which we used these functions the mapping is disappeared and every time when we open the mapping it is showing the warning The source or target structure has been changed or could not be found in the IR and the releven entries will be deleted Function ifSWithoutElse not found and we have checked boolean functions and these 2 functions are not available in production and it is available in other system.how can we get these functions into production. is it required any service pack to install.

Neeru