Run Requirements
BCL Convert BCL Convert app requires the following files to be present in the run folder to complete analysis:
• | BCL files (*.bcl, *.cbcl) |
• | Filter files (*.filter) |
• | Position files (*.locs, *.clocs, *s.locs) |
• | Aggregated files (*.bci) |
• | Run info file (*.xml) |
• | Config.xml—The config.xml file is only required for data produced by some systems. See the BCL Convert pages on the Illumina support site for more information. |
• | SampleSheet.csv—Supports sample sheets v1 and v2. See Sample Sheet for more details. |

BCL Convert requires the following files to run. Different inputs might be required based on the sequencing system used to produce the data.
Input |
Description |
---|---|
Base call files (*.bcl.bgzf) |
Base call (BCL) files are compressed with the gzip (*.gz) or blocked GNU zip (*.bgzf) format. |
Base call index files (*.bci) |
Base call index files (BCI) files contain one record per lane in binary format. BCI files are acceptable as input by BCL Convert but are not used for analysis. |
Concatenated base call files (*cbcl) |
Concatenated base call (CBCL) files contain aggregated BCL data. Tiles from the same lane and surface are aggregated into one CBCL file for each lane and surface. |
Filter files (*.filter) |
Filter files are binary files that specify whether a given cluster passed filter. |
Location files (*.locs, s.locs) |
Location files (LOCS) are binary files that contain the cluster positions on the flow cell. CLOCS files are compressed versions of LOCS files. |
Run information file (RunInfo.xml) |
The run information file resides at the root level of the output folder. The file contains the run name, number of cycles, whether a read is an Index Read, and the number of lanes, swaths and tiles. If this file does not exist in the output folder, the software produces an error. |
Configuration file (*.xml) |
The configuration file resides in the BaseCalls folder and contains metadata on the sequencing run. The file is in XML format. |