Exist-Db - front end failure following JVM crash

Hi all, following a JVM crash at the weekend, all of the apps front ends 
(except the dashboard) are failing to load and displaying the following 
error (this one from Monex). Has anyone seen anything similar? The db is 
accessible from Oxygen and seems fine, but nothing (including exide) 
will load...

Ralph

<exception>

<path>/db/apps/monex/modules/view.xql</path>
<message>exerr:ERROR The actual return type does not match the sequence 
type declared in the function's signature: config:app-title(node(), 
map(*)) text(). Expected cardinality: exactly one, got 0. [at line 63, 
column 50, source: /db/apps/monex/modules/view.xql] In function: 
config:app-title(node(), map(*)) 
[-1:-1:/db/apps/monex/modules/config.xqm] 
templates:process-output(element(), map(*), item()*, element()) 
[211:9:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:call-by-introspection(element(), map(*), map(*), function(*)) 
[189:28:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:call(item(), element(), map(*)) 
[137:36:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:process(node()*, map(*)) 
[148:81:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:process(node()*, map(*)) 
[148:81:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:process(node()*, map(*)) 
[428:17:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:process-output(element(), map(*), item()*) 
[230:9:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:process-output(element(), map(*), item()*, element()) 
[211:9:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:call-by-introspection(element(), map(*), map(*), function(*)) 
[189:28:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:call(item(), element(), map(*)) 
[145:37:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:process(node()*, map(*)) 
[133:51:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:process(node()*, map(*)) 
[90:9:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql] 
templates:apply(node()+, function(*), map(*)?, map(*)?) 
[43:5:/exist/etc/../data/expathrepo/shared-0.9.1/content/templates.xql]</message>
</exception>

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