DMAP files for all Infinium Arrays are available for two (2) years after the date of manufacture

Each Infinium BeadChip has a unique DMAP file, generated when the BeadChip is manufactured, which includes the location and identity of each beadtype on the array. The location of each beadtype is combined with the quantification of the signal associated with each bead as the BeadChip is scanned to generate the intensity data (.idat) files for each sample. The DMAP file is essential for processing Infinium BeadChip.

The expiration date of most Infinium BeadChips is one (1) year from the date of manufacture. The DMAP file must be downloaded within one (1) year after the BeadChip expires.

For 24-sample Infinium HTS BeadChips manufactured after July 1, 2022, the expiration date is eighteen (18) months from the date of manufacture. The DMAP file must be downloaded within six (6) months after expiration.

If the DMAP file is not downloaded within two (2) years after the manufacture date, the DMAP is no longer available and analysis of the BeadChip is not possible.

Illumina guarantees retention and access of DMAP files until two (2) years past the date of manufacture. In the past, DMAP files could be accessed after the two-year mark, though this access was not guaranteed. Illumina is changing the physical maintenance of the files on Illumina servers, such that the files will no longer be available beyond the two (2) year retention period.

This change takes effect August 2, 2021 and includes all Infinium Array versions, including commercial, semi-custom, custom, and consortia products.

Illumina is making this change to improve operations and performance of DMAP downloads. Illumina is committed to providing the highest-quality service and support during this change process.

For questions or concerns, contact Illumina Technical Support at [e-mail].

For any feedback or questions regarding this article (Illumina Knowledge Article #5602), contact Illumina Technical Support [e-mail].