diff --git a/src/deepsparse/transformers/engines/nl_decoder_engine.py b/src/deepsparse/transformers/engines/nl_decoder_engine.py
index 9c93616053..2670a315e9 100644
--- a/src/deepsparse/transformers/engines/nl_decoder_engine.py
+++ b/src/deepsparse/transformers/engines/nl_decoder_engine.py
@@ -154,7 +154,15 @@ def run(
 
         :return: The output of the engine
         """
+        if kv_cache is None:
+            # run the engine without the kv cache support
+            return self.engine.run(inputs, val_inp)
+
         if bool(kv_cache.engine_internal_cache):
+            # run the engine assuming internal kv cache
+            # management. In this case the LIB.kv_cache
+            # class object will be passed to the engine
+            # call as well
             # conventionally, before dispatching
             # inputs to the engine, we validate them
             # if val_inp=True. However, in this case
@@ -164,8 +172,10 @@ def run(
             return self.engine._eng_net.execute_list_out(
                 inputs, kv_cache.engine_internal_cache
             )
-        # run the engine without the LIB.kv_cache object
-        return self.engine.run(inputs, val_inp)
+        else:
+            # run the engine assuming external kv cache
+            # management.
+            return self.engine.run(inputs, val_inp, kv_cache)
 
     def __call__(
         self,
diff --git a/src/deepsparse/transformers/pipelines/text_generation.py b/src/deepsparse/transformers/pipelines/text_generation.py
index 6947817f0a..3ef82ca7f3 100644
--- a/src/deepsparse/transformers/pipelines/text_generation.py
+++ b/src/deepsparse/transformers/pipelines/text_generation.py
@@ -252,6 +252,15 @@ def __init__(
             if "WAND_OPT_FLAGS" not in os.environ:
                 os.environ["WAND_OPT_FLAGS"] = "default,~pyramids"
 
+        # the current requirement on the deepsparse engine
+        # is that prompt_sequence_length
+        # must be 1 or a multiple of four.
+        # for simplicity let's extend this requirement to all engines
+        if (prompt_sequence_length % 4 != 0) and (prompt_sequence_length != 1):
+            raise ValueError(
+                f"prompt_sequence_length must be 1 or multiple of 4. "
+                f"prompt_sequence_length is {prompt_sequence_length}"
+            )
         self.prompt_sequence_length = prompt_sequence_length
         self.force_max_tokens = force_max_tokens
         self.internal_kv_cache = internal_kv_cache
@@ -686,7 +695,10 @@ def engine_forward(
                 )
                 for prompt_logit in prompt_logits:
                     token_generator.generate(prompt_logit)
-                return numpy.array([self.tokens]), prompt_logits
+                yield numpy.array([token_generator.tokens]), prompt_logits, [
+                    FinishReason.LENGTH
+                ]
+                return
 
             else:
                 # run the prompt through