diff --git a/src/hs_ontology_api/routes/fieldassays/fieldassays_controller.py b/src/hs_ontology_api/routes/fieldassays/fieldassays_controller.py
index 3d85d29..38c55ac 100644
--- a/src/hs_ontology_api/routes/fieldassays/fieldassays_controller.py
+++ b/src/hs_ontology_api/routes/fieldassays/fieldassays_controller.py
@@ -2,7 +2,7 @@
 # JAS December 2023
 from flask import Blueprint, jsonify, current_app, request, make_response
 from hs_ontology_api.utils.neo4j_logic import field_assays_get_logic
-from hs_ontology_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names
+from ubkg_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names
 
 field_assays_blueprint = Blueprint('field-assays', __name__, url_prefix='/field-assays')
 
diff --git a/src/hs_ontology_api/routes/fielddescriptions/fielddescriptions_controller.py b/src/hs_ontology_api/routes/fielddescriptions/fielddescriptions_controller.py
index 497a023..b7e5791 100644
--- a/src/hs_ontology_api/routes/fielddescriptions/fielddescriptions_controller.py
+++ b/src/hs_ontology_api/routes/fielddescriptions/fielddescriptions_controller.py
@@ -2,7 +2,7 @@
 # JAS December 2023
 from flask import Blueprint, jsonify, current_app, request, make_response
 from hs_ontology_api.utils.neo4j_logic import field_descriptions_get_logic
-from hs_ontology_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names, \
+from ubkg_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names, \
     validate_parameter_value_in_enum
 
 field_descriptions_blueprint = Blueprint('field-descriptions', __name__, url_prefix='/field-descriptions')
diff --git a/src/hs_ontology_api/routes/fieldentities/fieldentities_controller.py b/src/hs_ontology_api/routes/fieldentities/fieldentities_controller.py
index 5eccc1d..6525806 100644
--- a/src/hs_ontology_api/routes/fieldentities/fieldentities_controller.py
+++ b/src/hs_ontology_api/routes/fieldentities/fieldentities_controller.py
@@ -2,7 +2,7 @@
 # JAS January 2024
 from flask import Blueprint, jsonify, current_app, request, make_response
 from hs_ontology_api.utils.neo4j_logic import field_entities_get_logic
-from hs_ontology_api.utils.http_error_string import get_404_error_string,validate_query_parameter_names, \
+from ubkg_api.utils.http_error_string import get_404_error_string,validate_query_parameter_names, \
     validate_parameter_value_in_enum
 
 
diff --git a/src/hs_ontology_api/routes/fieldschemas/fieldschemas_controller.py b/src/hs_ontology_api/routes/fieldschemas/fieldschemas_controller.py
index 38562b6..e255b2a 100644
--- a/src/hs_ontology_api/routes/fieldschemas/fieldschemas_controller.py
+++ b/src/hs_ontology_api/routes/fieldschemas/fieldschemas_controller.py
@@ -2,7 +2,7 @@
 # JAS January 2024
 from flask import Blueprint, jsonify, current_app, request, make_response
 from hs_ontology_api.utils.neo4j_logic import field_schemas_get_logic
-from hs_ontology_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names, \
+from ubkg_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names, \
     validate_parameter_value_in_enum
 
 field_schemas_blueprint = Blueprint('field-schemas', __name__, url_prefix='/field-schemas')
diff --git a/src/hs_ontology_api/routes/fieldtypes/fieldtypes_controller.py b/src/hs_ontology_api/routes/fieldtypes/fieldtypes_controller.py
index 68cabd9..9501bc8 100644
--- a/src/hs_ontology_api/routes/fieldtypes/fieldtypes_controller.py
+++ b/src/hs_ontology_api/routes/fieldtypes/fieldtypes_controller.py
@@ -2,7 +2,7 @@
 # JAS December 2023
 from flask import Blueprint, jsonify, current_app, request, make_response
 from hs_ontology_api.utils.neo4j_logic import field_types_get_logic
-from hs_ontology_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names, \
+from ubkg_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names, \
     validate_parameter_value_in_enum
 
 
diff --git a/src/hs_ontology_api/routes/fieldtypesinfo/fieldtypesinfo_controller.py b/src/hs_ontology_api/routes/fieldtypesinfo/fieldtypesinfo_controller.py
index 5d06935..95d376e 100644
--- a/src/hs_ontology_api/routes/fieldtypesinfo/fieldtypesinfo_controller.py
+++ b/src/hs_ontology_api/routes/fieldtypesinfo/fieldtypesinfo_controller.py
@@ -2,7 +2,7 @@
 # JAS January 2024
 from flask import Blueprint, jsonify, current_app, request, make_response
 from hs_ontology_api.utils.neo4j_logic import field_types_info_get_logic
-from hs_ontology_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names, \
+from ubkg_api.utils.http_error_string import get_404_error_string, validate_query_parameter_names, \
     validate_parameter_value_in_enum
 
 field_types_info_blueprint = Blueprint('field-types-info', __name__, url_prefix='/field-types-info')
diff --git a/src/hs_ontology_api/utils/http_error_string.py b/src/hs_ontology_api/utils/http_error_string.py
deleted file mode 100644
index 886d9b0..0000000
--- a/src/hs_ontology_api/utils/http_error_string.py
+++ /dev/null
@@ -1,123 +0,0 @@
-# coding: utf-8
-# Common functions used for format HTTP error messages (404, 400) for endpoints.
-
-from flask import request
-
-def format_request_path():
-    """
-    Formats the request path for an error sgring.
-    :return:
-    """
-    # The request path will be one of three types:
-    # 1. The final element will correspond to the endpoint (e.g., /field-descriptions)
-    # 2. The penultimate element will correspond to the endpoint, and the final element will be a filter.
-    pathsplit = request.path.split('/')
-    err = f"{pathsplit[0]} "
-    if len(pathsplit) > 3:
-        err = err + f" for path {request.path}"
-    elif len(pathsplit) == 3:
-        err = err + f" for '{pathsplit[2]}'"
-    else:
-        err = err + f" for '{pathsplit[1]}'"
-
-    return err
-
-def format_request_query_string():
-    """
-    Formats teh request query string for error messages.
-
-    :return:
-    """
-    err = ''
-
-    listerr = []
-    for req in request.args:
-        listerr.append(f"'{req}'='{request.args[req]}'")
-
-    if len(listerr) > 0:
-        err = ' and query parameter'
-        if len(listerr) > 1:
-            err = err + 's'
-        err = err + ' ' + ' ; '.join(listerr) + '.'
-
-    return err
-
-def get_404_error_string(prompt_string=None):
-    """
-    Formats an error string for a 404 response, accounting for optional parameters.
-    :param: prompt_string - optional description of error
-    :return: string
-    """
-    if prompt_string is None:
-        err = "No values for "
-    else:
-        err = prompt_string
-
-    err = err + format_request_path() + format_request_query_string()
-
-    return err
-
-def get_number_agreement(list_items=None):
-    """
-    Builds a clause with correct number agreement
-    :param list_items: list of items
-    :return:
-    """
-    if len(list_items) < 2:
-        return ' is'
-    else:
-        return 's are'
-
-
-def list_as_single_quoted_string(delim: str = ';', list_elements=None):
-    """Converts the list of elements in list_elements into a string formatted with single quotes--
-    e.g., ['a','b','c'] -> "'a'; 'b'; 'c'"
-
-    """
-    return f'{delim} '.join(f"'{x}'" for x in list_elements)
-
-
-def validate_query_parameter_names(parameter_name_list=None):
-    """
-    Validates query parameter names in the querystring. Prepares the content of a 404 message if the
-    querystring includes an unexpected parameter.
-    :param parameter_name_list:
-    :return:
-    - "ok"
-    - error string for a 400 error
-    """
-
-    for req in request.args:
-        if req not in parameter_name_list:
-            namelist = list_as_single_quoted_string(list_elements=parameter_name_list)
-            prompt = get_number_agreement(parameter_name_list)
-            return f"Invalid query parameter: '{req}'. The possible parameter name{prompt}: {namelist}. " \
-                   f"Refer to the SmartAPI documentation for this endpoint for more information."
-
-    return "ok"
-
-
-def validate_parameter_value_in_enum(param_name=None, param_value=None, enum_list=None):
-    """
-    Verifies that a parameter's value is a member of a defined set--i.e., the equivalent of in an enumeration.
-    :param enum_list: list of enum values
-    :param param_value: value to validate
-    :param param_name: parameter name
-    :return:
-    --"ok"
-    --error string suitable for a 400 message
-    """
-
-    if param_value is None:
-        return "ok"
-
-    if param_name is None:
-        return "ok"
-
-    if param_value not in enum_list:
-        namelist = list_as_single_quoted_string(list_elements=enum_list)
-        prompt = get_number_agreement(enum_list)
-        return f"Invalid value for parameter: '{param_name}'. The possible parameter value{prompt}: {namelist}. " \
-               f"Refer to the SmartAPI documentation for this endpoint for more information."
-
-    return "ok"
diff --git a/test/test_api.sh b/test/test_api.sh
index adc2701..89869ea 100755
--- a/test/test_api.sh
+++ b/test/test_api.sh
@@ -169,8 +169,6 @@ echo
 echo | tee -a test.out
 echo | tee -a test.out
 
-exit;
-
 echo "TESTS FOR: dataset-types GET" | tee -a test.out
 echo "SIGNATURE: /dataset-types?application_context" | tee -a test.out
 echo | tee -a test.out