Redhat Transition issue

[Ashwin Khandare]

hi everybody,                         We have built a software using shell,perl     ,php  etc  that runs on this 6.2 linux box properly.                         But we r facing major problem in transitioning to 7.2 since our software dont run on 7.2 and it crashes.The reason         we have been able to investigate so far is that                         a)There has been change in directory structure to some extent                         b)Path of various configuration files have been changed                         c)New libraries have been introduced           My question is whether there are any fix update pattern when transitioning from one version to another?         How do we transition from 6.2 to 7.2 with  software working on same w/o any problem?Are their any patches that we need         to install to get it to work?           Also in case even soemhow if we get it to work on 7.2 , will it still work on 8.0 when it will be released.?           This issue is bothering us badly and we need a solution for the same immediately.           Therefore I kindly request to u to respond as early as possible.             Thank you very much in advance             Ashwin Khandare         Software Engineer         Mobile - 9869019116