First I was trying latest java version java8 update 351 and it was not working but when I installed older version (Java8 update 291) it will work smoothly
This worked.
1. bcprov-jdk14-141.jar in FVU_7.8/TDS_RPU_4.3 folder is outdated/expired
2. download bcprov-jdk18on-173b04.jar from https://downloads.bouncycastle.org/betas/
3. rename/delete bcprov-jdk14-141.jar
4. rename bcprov-jdk18on-173b04.jar to bcprov-jdk14-141.jar
5. run the TDS/RPU/FVU utility