Known Issue 343

Gross losses are incorrect when layers are coded only for individual sub-perils.

Issue ID	343
Summary	Gross losses are incorrect when layers are coded only for individual sub-perils.
Description	When exposures contain layers that apply only to individual sub-perils within a model, the gross losses are calculated incorrectly. This is specific to cases where there are duplicate locations (each coded for a particular sub-peril of the model) or multi-term exposures (where each location record has terms by sub-peril). For example, if an exposure is being analyzed for two duplicate locations, coded for wind and surge respectively, and if there are two layers, again coded for wind and surge respectively, each layer is accepting losses from both locations. The issue does not present itself for sub-limits that are coded for individual sub-perils. The issue does not affect losses from across models. It is applicable only when analyzing sub-peril losses for a given model.
Resolved in	Touchstone 2023 (11.0)
Date posted	7/11/2022
Software versions affected	10.0, 9.1, 9.0
Feature set	Detailed loss
Models	All
Potential for loss numbers impact	Yes
Workaround	Instead of creating layers for each sub-peril, if users create whole contracts that are sub-peril specific and then analyze the appropriate locations, the losses will be on expected lines.