Mastering BUtil involves understanding how to utilize the command-line utility provided by Actian (formerly Pervasive / Btrieve) to maintain .BTR transactional database files. This core tool allows database administrators to repair corrupted tables, extract salvageable data, and manage performance by tweaking memory cache allocation. Fixing Corrupted Btrieve Files
Database corruption in Btrieve usually manifests as a Status 2 (Data file damaged) or Status 4 (Key value not found / corrupt index) error. The standard methodology to repair a corrupted file involves isolating the schema, extracting the readable data, and rebuilding a clean copy of the database. Method 1: The Clone and Copy Routine
If the primary data pages are intact but the database index or header has minor damage, you can clone the structure and migrate the data sequentially.
Isolate the target file and create a secure backup copy before proceeding.
Execute the clone command to build an identical, empty file shell:BUTIL -CLONE newfile.btr corruptedfile.btr
Migrate the records from the broken file into the clean empty shell:BUTIL -COPY corruptedfile.btr newfile.btr
Swap the files by renaming the original to .bak and naming the clean clone to match the production filename. Method 2: The Recover and Load Routine (For Severe Damage)
When severe corruption causes the -COPY command to fail midway, you must dump the database records into an unformatted flat ASCII file using either sequential or index paths to bypass damaged sectors. Using Butil to Fix Corrupted Files – Actian Communities
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