Controller received command whilst busy on proteus

I am using LM016L LCD and 16f722A MCU in proteus. I am running a simple program to send a 'single' character to LCD. Program runs fine and the cursor is shown on the LCD but the proteus doesn't show the character. The following error shows that the controller of LCD was busy when the character was transferred but I have already built a function to see whether the LCD is busy or not before the transmission of character.


Here...

Controller received command whilst busy on proteus