I have a test case where I run batch process for account and lead records

The batch process for account does not run.

Here is the debug log for account

10:10:32.921|CODE_UNIT_STARTED|[EXTERNAL]|01pA0000001ORii|sds.AccountUpdaterBatch
10:10:32.923|METHOD_ENTRY|[19]|Database.getQueryLocator(String)
10:10:32.924|SOQL_EXECUTE_BEGIN|[19]|Aggregations:0|select id ,Name,SLASerialNumber__c from account
10:10:32.987|SOQL_EXECUTE_END|[19]|Rows:6
10:10:32.987|METHOD_EXIT|[19]|Database.getQueryLocator(String)
10:10:33.023|FATAL_ERROR|Internal Salesforce.com Error
10:10:33.023|CUMULATIVE_LIMIT_USAGE
10:10:33.023|LIMIT_USAGE_FOR_NS|sds|
Number of SOQL queries: 0 out of 200
Number of query rows: 0 out of 10000
Number of SOSL queries: 0 out of 20
Number of DML statements: 0 out of 100
Number of DML rows: 0 out of 10000
Number of script statements: 1 out of 1000000
Maximum heap size: 0 out of 6000000
Number of callouts: 0 out of 1
Number of Email Invocations: 0 out of 10
Number of fields describes: 0 out of 100
Number of record type describes: 0 out of 100
Number of child relationships describes: 0 out of 100
Number of picklist describes: 0 out of 100
Number of future calls: 0 out of 0
Number of find similar calls: 0 out of 10
Number of System.runAs() invocations: 0 out of 20

10:10:33.023|TOTAL_EMAIL_RECIPIENTS_QUEUED|0
10:10:33.023|CUMULATIVE_LIMIT_USAGE_END

10:10:33.023|CODE_UNIT_FINISHED|sds.AccountUpdaterBatch

Here is the debug log for lead

10:10:33.147|CODE_UNIT_STARTED|[EXTERNAL]|01pA0000001ORii|sds.AccountUpdaterBatch
10:10:33.148|METHOD_ENTRY|[19]|Database.getQueryLocator(String)
10:10:33.149|SOQL_EXECUTE_BEGIN|[19]|Aggregations:0|select id ,FirstName,LastName from lead
10:10:33.210|SOQL_EXECUTE_END|[19]|Rows:47
10:10:33.211|METHOD_EXIT|[19]|Database.getQueryLocator(String)
10:10:33.291|CUMULATIVE_LIMIT_USAGE
10:10:33.291|LIMIT_USAGE_FOR_NS|sds|
Number of SOQL queries: 0 out of 200
Number of query rows: 0 out of 10000
Number of SOSL queries: 0 out of 20
Number of DML statements: 0 out of 100
Number of DML rows: 0 out of 10000
Number of script statements: 1 out of 1000000
Maximum heap size: 0 out of 6000000
Number of callouts: 0 out of 1
Number of Email Invocations: 0 out of 10
Number of fields describes: 0 out of 100
Number of record type describes: 0 out of 100
Number of child relationships describes: 0 out of 100
Number of picklist describes: 0 out of 100
Number of future calls: 0 out of 0
Number of find similar calls: 0 out of 10
Number of System.runAs() invocations: 0 out of 20

10:10:33.291|TOTAL_EMAIL_RECIPIENTS_QUEUED|0
10:10:33.291|CUMULATIVE_LIMIT_USAGE_END

10:10:33.291|CODE_UNIT_FINISHED|sds.AccountUpdaterBatch

For accounts I get an error but I don't know why that error is there. The error line is in bold.

Please guide.

Thanks,

Hector....