"I Checked your order, your module doesn't have flash chip installed, so, there are only 16KB space for welcome screen"
That's interesting, I hadn't figured that out myself. Anyway, the image counts 100x125 pixels, so 12500 bytes. That ought to fit then.
The EDIMs requir w*h to calculate the data size; likewise wants SSS the data size explicitly supplied. Mistakes with that freeze the display for it keeps waiting forever on more data.
By all that I can judge, the data transmission runs well now. The program continues and the screen remains responsive. Only the screen stays black after start-up. I did issue a DSS/1 for the sake of it.