Total error while processing the frame and response

[mati294]

Hello, I'm trying to run the library on an STM32C0 and I'm unable to receive the correct data or send a response message.
To rule out DMA or HAART issues, I'm manually sending the frame.

mbus_poll(modbus, frame_by_bit);

The register address is correct, but the value is always 96, regardless of what I send.

Using the added ctx->header.data, I'm checking the values ​​ctx->conf.recvbuf[2 * (ctx->header.num - ctx->header.rnum)] = byte; this is fine.
And here, 0 and 2 appear
[2 * (ctx->header.num - ctx->header.rnum)]

When I try to send response this is activates:
if (ctx->conf.send == 0 || pbuf == 0 || ctx->conf.sendbuf_sz < (size + 2))
return MBUS_ERROR;