Text doesn't appear in Coreldraw

When i open an AutoCAD file in Coreldraw having multiline text, the text doesn't appear, only text box with dotted boundary appear instead of text and i've to select "Fit Text to Frame" for every text box to bring the text back to display. There are more than 1000 text lines and i can't apply the same procedure on very text box. How can we do it in one go.