From SuperMemopedia

Problem

While executing Cloze Deletion:

Error setting HTML text

Access violation at address 7C350428 in module 'MSVCR71.dll'

Read of address 00000000

Relevant collection/system details:

SuperMemo 2004 (Build 12.06, Apr 4, 2005)
Time: Nov 15, 2005, 13:31
Collection       C:\Program Files\SuperMemo\systems\Business Bible
Date             11/15/2005 (Tue)
Total            833 el.

Windows XP 5.1 (Build 2600) Service Pack 2
Internet Explorer 6.0 (SP2)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)
Memory Used: 1.569 MB
Active Code Page: 1252
OEM Code Page: 437
Network installed

Ideas

The problem seems to result from interference between Internet Explorer and Microsoft C Runtime Library (msvcr71.dll). You might update that library, reconfigure/reinstall/remove .NET CLR, etc.

You could also Google with keywords: MSVCR71.dll and/or 7C350428

The error occurs when SuperMemo wants to write HTML text to Internet Explorer. SuperMemo calls IE which then calls MSVCR71.dll for unknown reasons.