Search Results for "corruption"

Microsoft recommends several methods for recovering Excel data from corrupt spreadsheets. S2 Recovery Tools for Microsoft Excel makes it easy to follow these recommended routines by just pressing buttons. The application also adds five methods of its own for recovery. Additionally it has its own native previous file version recovery tool which works in any version of Vista, Windows 7 and Windows 8. Another feature of the program is a preloaded search interface for finding temporary,...

DOCX, XLSX and PPTX files are collections of conventionally zipped mostly XML sub-files. This program first attempts repair any zip based corruption. From there it engages in four different algorithmic attempts at repair or recovery. With the first method using validation, the location of the first XML error is sought. At that point the sub-files are truncated and repaired. The second method works the same way except the XML validation is more lax. With the third, the strict XML validation is returned to and corrupt XML sub-files are truncated and repaired as before however, missing XML sub-files are brought in from blank full healthy docx, xlsx or pptx of the respective correct extension. ...

...Additionally some extra text or data may be recoverable by changing the truncation amount to less than 50 characters.The extra truncation is needed in the first place because the XML validator used is not able to perfectly identify where the XML corruption begins and will often not flag the corruption for several characters after it begins.

XML was designed from the beginning to be intolerant of errors. This decision adversely affects MS Word's corruption recovery. With one error in the document.xml subfile where all the DOCX file's text is stored, instead of a partial recovery, Word will stop and throw an error. Savvy DOCX Recovery attempts to do precise surgery on corrupt Word documents to reorder or excise bad XML tags. If this doesn't work, it uses the command line app xmllint first to attempt to repair corrupt XML subfiles of the DOCX. ...

...Corrupt DOCX Salvager uses 7Zip, an unzipper that sometimes unzips partially corrupt document.xml files despite reporting an error. XML as a format is unforgiving of data corruption but Corrupt DOCX Salvager uses a Perl routine used to extract the text from the document.xml file which doesn't care about well-formed XML, a recovery stumbling block for Microsoft Word. Recent changes include the pretreatment of docx files with InfoZip's zip.exe -FF repair command, improving success rates. Also added are links to other solutions. ...

Update: It is probably wise to try to do a zip repair step on corrupt xlsx files as a first step before trying to invoke other methods. Microsoft recommends several methods for recovering from Excel corruption. This Excel add-in brings into one toolbar these methods while adding four data recovery methods of its own. For MS methods for recovering from Excel file corruption, see: http://office.microsoft.com/en-us/excel-help/repairing-corrupted-files-in-excel-HA001034656.aspx or here: http://office.microsoft.com/en-us/excel-help/repairing-a-corrupted-workbook-HA010097017.aspx. ...