I am using a quorum 7 nodes example with IBFT genesis file. I have modified the maxCodeSizeConfig to 128KB (which is maximum). I have also increased the gas limit to 0x3B9AC9FFFFFF. But, when I am trying to call my setVariable(ciphertext).send() method, I am still getting the same error as Oversized data when calling the method.
You need to increase the transaction data size, not the code size. The transaction data size can be increased on Quorum with the genesis
txnSizeLimit value (up to 128kb).