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CUL's request system was designed with a single-holdings model.  Request failures may occur when duplicate off,xxx HLDGs have different access and delivery permissions.  This problem does not manifest for HLDGs with identical access permissions, only for those with asymmetical permissions.  For example: c.1 belongs to a circulating collection and c.2 belongs to a restricted special collection.  Commonly at CUL, the restricted holding belongs to Avery Library (AR), Butler Media Center (CV), Health Sciences Library (HR), Music Library (MR) or The Burke Library (UT).

Access permissions are controlled by customer code at ReCAP.  Customer code is a two-letter code, e.g. AR, CU, CV or UT.  Every item accessioned at ReCAP is assigned a single customer code in the LAS database.  Each customer code has authorized delivery locations associated with it.  This provides strong oversight for special collections.  See "Delivery Restrictions" column on the Customer Code Table.

Delivery options on the requesting webforms load according to CLIO location.  CLIO locations at CUL correspond to customer codes at ReCAP (e.g. off,glx/CU or off,bmc/CV).  On the requesting webforms HLDGs display in numerical order by ID number.  Delivery options load according to the last holding in the series, i.e. the copy with the numerically highest HLDG ID number. 

The two scenarios described below may result when there are multiple off,xxx HLDGs with asymmetrical permissions; at least one is restricted and the other(s) unrestricted.  Scenario 1 may lead to a request failure when delivery options are listed for the unrestricted copy.  Scenario 2 leads to valid but restricted delivery options when the delivery options are listed for the restricted copy.  Reminder: delivery options depend on the order in which the HLDGs are listed.

In the first scenario, the delivery options and default delivery location load for the unrestricted copy.  In this scenario the unrestricted copy is listed last, has the highest HLDG#, and populates the drop-down menu.  If the patron selects the restricted copy for physical delivery and an unauthorized delivery location,  a failure notice will be sent to the ReCAP Coordinator.  Likewise, if the patron selects the restricted copy for EDD, it will fail because the default delivery location is set for the unrestricted copy.  The failure notice message is different for physical delivery than for EDD. See example for BIBL# 1447116 for an example of a failed physical delivery.  See example for BIBL# 2262748 for failed EDD.

In the second scenario, the drop-down menu lists only the delivery options for the restricted copy.  In this scenario the restricted copy is listed last, has the highest HLDG#, and populates the drop-down menu.  If the patron selects the unrestricted copy the request will be successful and may deliver to an undesired or inconvenient location.  Likewise, if an EDD request fails the default delivery option will be valid.  See example for BIBL# 3262350.

Matters are slightly more complicated for Butler Media Center videos (CV) than for Avery Library collections (AR).  Recent acquisitions from Home Video and Kim's Video have resulted in duplication of many holdings.  Typically one copy is circulating (CU) and the other is non-circulating (CV).  Requests via CLIO most often display delivery options for off,glx (CU) which does not include Milstein Reserves.  Milstein Reserves is the only allowable delivery location for CV.  For deliveries to Milstein Reserves staff must use Mediated Request.