Hi community,

While upgrading onsite Creatio application from 8.1 to 8.3 , Iam getting the below error:

I did Generate all schemas and compile all before running the update script. If you have any suggestions, please free to drop a comment.

Thanks in advance.

Mani

I am getting below error while installing package from one creatio instance to another. JFYI, In my workplace, I have added Products and Invoices sections. 
I am unable to identify root cause of an issue. Any help would be greatly appreciated. 

2025-11-27 15:26:57,719 Error occurred while generating schema source code "Product" in package "XXXXXX". UId aa4bec4a-c36b-45ba-aedb-69e98150ca16: Object reference not set to an instance of an object.
2025-11-27 15:26:57,734 System.NullReferenceException: Object reference not set to an instance of an object.
 at Terrasoft.Core.Entities.EntitySchema.GetShowInAdvancedMode(Guid uid)
 at Terrasoft.Core.Entities.EntitySchema.get_ShowInAdvancedMode()
 at Terrasoft.Core.Entities.EntitySchemaGenerator.WriteSchemaClassPrimaryInfo(SchemaCodeGeneratorResource`1 resource, EntitySchema entitySchema, EntitySchema parentEntitySchema, ICollection`1 protectedMethods)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSchemaCode(GeneratorContext context, SchemaCodeGeneratorResource`1 resource, EntitySchema entitySchema)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.WriteSchemaClassBody(GeneratorContext context, SchemaCodeGeneratorResource`1 resource, GeneratorTokenVisibility sourceVisibility)
 at Terrasoft.Core.CodeGeneration.SchemaCodeGenerator`1.GenerateSourceCode(SchemaCodeGeneratorResource`1 resource, TextWriter streamWriter, Action`3 action)
 at Terrasoft.Core.CodeGeneration.SchemaCodeGenerator`1.GenerateSourceCode(SchemaCodeGeneratorResource`1 resource, String sourceFileName)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSchemaSource(SchemaCodeGeneratorResource`1 resource, EntityCollection sourceCollection, String sourceFileName)
 at Terrasoft.Core.CodeGeneration.SchemaCodeGenerator`1.GenerateSources(SchemaCodeGeneratorResource`1 resource)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSources(SchemaCodeGeneratorResource`1 resource, EntitySchema schema)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSources(SchemaCodeGeneratorResource`1 resource)
 at Terrasoft.Core.SchemaManager`1.GetSchemaSources(TSchemaManagerSchema schema, Guid schemaId, UserConnection userConnection)
 at Terrasoft.Core.Entities.EntitySchemaManager.GetSchemaSources(EntitySchema schema, Guid schemaId, UserConnection userConnection)
 at Terrasoft.Core.SchemaManager`1.GenerateSchemaSources(TSchemaManagerSchema schema, Guid schemaId, UserConnection userConnection)
 at Terrasoft.Core.SchemaManager`1.GenerateSchemaSources(Guid sysSchemaId, ISchemaManagerItem schemaManagerItem, UserConnection userConnection)
 at Terrasoft.Core.Packages.PackageInstallUtilities.InstallSchemaAssociatedData(Guid schemaId, SchemaDescriptor schemaDescriptor, Boolean continueIfError)
2025-11-27 15:26:57,734 Error occured while performing operation on "Product" item, UId = aa4bec4a-c36b-45ba-aedb-69e98150ca16.
2025-11-27 15:26:57,734 System.NullReferenceException: Object reference not set to an instance of an object.
 at Terrasoft.Core.Entities.EntitySchema.GetShowInAdvancedMode(Guid uid)
 at Terrasoft.Core.Entities.EntitySchema.get_ShowInAdvancedMode()
 at Terrasoft.Core.Entities.EntitySchemaGenerator.WriteSchemaClassPrimaryInfo(SchemaCodeGeneratorResource`1 resource, EntitySchema entitySchema, EntitySchema parentEntitySchema, ICollection`1 protectedMethods)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSchemaCode(GeneratorContext context, SchemaCodeGeneratorResource`1 resource, EntitySchema entitySchema)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.WriteSchemaClassBody(GeneratorContext context, SchemaCodeGeneratorResource`1 resource, GeneratorTokenVisibility sourceVisibility)
 at Terrasoft.Core.CodeGeneration.SchemaCodeGenerator`1.GenerateSourceCode(SchemaCodeGeneratorResource`1 resource, TextWriter streamWriter, Action`3 action)
 at Terrasoft.Core.CodeGeneration.SchemaCodeGenerator`1.GenerateSourceCode(SchemaCodeGeneratorResource`1 resource, String sourceFileName)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSchemaSource(SchemaCodeGeneratorResource`1 resource, EntityCollection sourceCollection, String sourceFileName)
 at Terrasoft.Core.CodeGeneration.SchemaCodeGenerator`1.GenerateSources(SchemaCodeGeneratorResource`1 resource)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSources(SchemaCodeGeneratorResource`1 resource, EntitySchema schema)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSources(SchemaCodeGeneratorResource`1 resource)
 at Terrasoft.Core.SchemaManager`1.GetSchemaSources(TSchemaManagerSchema schema, Guid schemaId, UserConnection userConnection)
 at Terrasoft.Core.Entities.EntitySchemaManager.GetSchemaSources(EntitySchema schema, Guid schemaId, UserConnection userConnection)
 at Terrasoft.Core.SchemaManager`1.GenerateSchemaSources(TSchemaManagerSchema schema, Guid schemaId, UserConnection userConnection)
 at Terrasoft.Core.SchemaManager`1.GenerateSchemaSources(Guid sysSchemaId, ISchemaManagerItem schemaManagerItem, UserConnection userConnection)
 at Terrasoft.Core.Packages.PackageInstallUtilities.InstallSchemaAssociatedData(Guid schemaId, SchemaDescriptor schemaDescriptor, Boolean continueIfError)
2025-11-27 15:26:57,734 Error occured while performing operation on "Product" item, UId = aa4bec4a-c36b-45ba-aedb-69e98150ca16.
2025-11-27 15:26:57,734 System.NullReferenceException: Object reference not set to an instance of an object.
 at Terrasoft.Core.Entities.EntitySchema.GetShowInAdvancedMode(Guid uid)
 at Terrasoft.Core.Entities.EntitySchema.get_ShowInAdvancedMode()
 at Terrasoft.Core.Entities.EntitySchemaGenerator.WriteSchemaClassPrimaryInfo(SchemaCodeGeneratorResource`1 resource, EntitySchema entitySchema, EntitySchema parentEntitySchema, ICollection`1 protectedMethods)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSchemaCode(GeneratorContext context, SchemaCodeGeneratorResource`1 resource, EntitySchema entitySchema)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.WriteSchemaClassBody(GeneratorContext context, SchemaCodeGeneratorResource`1 resource, GeneratorTokenVisibility sourceVisibility)
 at Terrasoft.Core.CodeGeneration.SchemaCodeGenerator`1.GenerateSourceCode(SchemaCodeGeneratorResource`1 resource, TextWriter streamWriter, Action`3 action)
 at Terrasoft.Core.CodeGeneration.SchemaCodeGenerator`1.GenerateSourceCode(SchemaCodeGeneratorResource`1 resource, String sourceFileName)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSchemaSource(SchemaCodeGeneratorResource`1 resource, EntityCollection sourceCollection, String sourceFileName)
 at Terrasoft.Core.CodeGeneration.SchemaCodeGenerator`1.GenerateSources(SchemaCodeGeneratorResource`1 resource)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSources(SchemaCodeGeneratorResource`1 resource, EntitySchema schema)
 at Terrasoft.Core.Entities.EntitySchemaGenerator.GenerateSources(SchemaCodeGeneratorResource`1 resource)
 at Terrasoft.Core.SchemaManager`1.GetSchemaSources(TSchemaManagerSchema schema, Guid schemaId, UserConnection userConnection)
 at Terrasoft.Core.Entities.EntitySchemaManager.GetSchemaSources(EntitySchema schema, Guid schemaId, UserConnection userConnection)
 at Terrasoft.Core.SchemaManager`1.GenerateSchemaSources(TSchemaManagerSchema schema, Guid schemaId, UserConnection userConnection)
 at Terrasoft.Core.SchemaManager`1.GenerateSchemaSources(Guid sysSchemaId, ISchemaManagerItem schemaManagerItem, UserConnection userConnection)
 at Terrasoft.Core.Packages.PackageInstallUtilities.InstallSchemaAssociatedData(Guid schemaId, SchemaDescriptor schemaDescriptor, Boolean continueIfError)

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