---
title: Index not found or initialized issues
slug: n52a0144
canonical_url: https://docs.coveo.com/en/n52a0144/
collection: coveo-for-sitecore-v5
source_format: adoc
---
# Index not found or initialized issues
## Symptoms

There may be many error messages appearing in the Sitecore logs.

Examples of error messages you may see:

```text
"The provided index '{0}' was not found." <1>
```

```text
Exception System.ArgumentNullException: Precondition failed: The parameter 'FieldMap' must not be null <2>
Parameter name: FieldMap
   at Coveo.Framework.CNL.Precondition.NotNull(Object p_Parameter, String p_ParameterName)
   at Coveo.Framework.Fields.CoveoFieldNameTranslator.TranslateToCoveoFormat(String p_SitecoreFieldName, Boolean p_UsePrefix)
   at Coveo.AbstractLayer.FieldManagement.FieldsHandlerUtility.EnrichFieldInfoWithTranslatedFieldName(FieldInformation p_FieldInfo)
   at Coveo.Framework.Collections.EnumerableExtensions.ForEach[T](IEnumerable`1 p_Enumerable, Action`1 p_Action)
   at Coveo.AbstractLayer.FieldManagement.FieldsHandlerUtility.GetCompleteFieldConfigs(String p_IndexName)
   at Coveo.AbstractLayer.FieldManagement.CachedFieldsHandlerUtility.<Invalidate>b__11_0()
```

```text
Exception System.NullReferenceException: Object reference not set to an instance of an object. <3>
   at Coveo.SearchProvider.AbstractSearchIndexSummary.<get_NumberOfDocuments>b__42_1()
   at Coveo.SearchProvider.AbstractSearchIndexSummary.TryPerformCallToIndexCommunication[T](Func`1 p_CallToIndexCommunication, T p_DefaultValue)
   at Coveo.SearchProvider.AbstractSearchIndexSummary.<get_NumberOfDocuments>b__42_0()
   at Coveo.SearchProvider.AbstractSearchIndexSummary.get_NumberOfDocuments()
   at Coveo.SearchProvider.AbstractSearchIndexSummary.GetIndexStatistics()
   at Coveo.Service.Api.IndexServiceBase.Indexes.IndexesServiceFetcher.ConvertToIndex(IProviderIndex p_ProviderIndex, IDictionary`2 p_IndexesDictionary)
   at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at Coveo.Service.Api.IndexServiceBase.Indexes.IndexesServiceFetcher.GetCoveoIndexes()
```

## Cause

The actual root cause for these errors often lies upstream.
The resolution section below provides help on where to find the root cause in the logs.

## Resolution

Error 1 may result from a Sitecore instance shutting down or starting up around the same time.

```text
WARN  Sitecore shutting down
WARN  Shutdown message: HostingEnvironment initiated shutdown
```

```text
INFO  HttpModule is being initialized
INFO  Sitecore started
```

Errors 2 and 3 may result from the indexes not being initialized upon installation of Coveo for Sitecore.
Search for the following log messages and make sure no error occurred while the index was initializing.

```text
INFO Initializing index "Coveo_master_index"...
```

```text
INFO Initializing index "Coveo_web_index"...
```