Facing error during loading of lua script

edit

Hi,

I am facing below error while loading my lua script :

Lua:Error during loading: .lua : 809: No such int32_t function/proper for object type 'ProtoFiled'
stack traceback:
 [C]: in function '_index' *.lua:809 in main chunk.

Below is highlighted line is 809:

local logControlresp = {
      LogControlresp = "LOGCONTRLRESPONSEStruct",
      **transId        = ProtoField.int32_t("RSYS_FAPI.logControlresp.transId", "transId"),**
      nStatus        = ProtoField.int32_t("RSYS_FAPI.logControlresp.nStatus", "paramCnt"),
}
logControlresp.transId,
logControlresp.nStatus,

function addPhyLogCtrlRespToTree(tvbuf, tree, offset, payLen, endianness)

    local info
    local PhyLogCtrlRespTree
    info = tvbuf:range(offset, payLen)
    PhyLogCtrlRespTree = tree:add(info, logControlresp.LogControlresp)
    info = tvbuf:range(offset, 4)
    PhyLogCtrlRespTree:add_packet_field(logControlresp.transId, info, endianness)
    offset = offset + 4
    info = tvbuf:range(offset, 1)
    PhyLogCtrlRespTree:add_packet_field(logControlresp.nStatus, info, endianness)
    offset = offset + 1


    offset = offset + THREE_BYTES_RESERVED    
end

Please help me to solve this error I am new to lua parser scripting and not getting solution to this online