LyX ⇒ Error with generating PDF for an Abstract of an Article

[yoni206]

Hello,
I am writing a LyX file. The document class is "article". The file contains an abstract. When I try to export it to PDF (using the toolbar button) I get the following message:

Code: Select all

"!pdfTeX error: pdflatex (file ecrm0900): Font ecrm0900 at 600 not found".

If I erase the abstract, there is no problem.

I will be grateful for any help on this subject.