Php exec failed but module working fine on cmdline

I have a xampp setup and im calling a opencv module from php exec function which has been tested to work fine on the system. But when i call it with php, it fails with the result as a random negative number. for eg:--1073741819.

Further investigation lead to the conclusion that the culprit was libtesseract302.dll but it just seems to work fine from the cmdline on the same system and not on xampp.

Any help is deeply appreciated.